- Discovery and Total Synthesis of Streptoaminals: Antimicrobial [5,5]-Spirohemiaminals from the Combined-Culture of Streptomyces nigrescens and Tsukamurella pulmonis
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A series of lipidic spirohemiaminals, designated streptoaminals, is reported. These were discovered by surveying the unique molecular signatures identified in the mass spectrometry data of the combined-culture broth of Streptomyces nigrescens HEK616 and T
- Sugiyama, Ryosuke,Nishimura, Shinichi,Ozaki, Taro,Asamizu, Shumpei,Onaka, Hiroyasu,Kakeya, Hideaki
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Read Online
- A stereospecific synthesis and unambiguous assignment of the absolute configuration of (-)-erythro-Mefloquine hydrochloride
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(-)-erythro-Mefloquine hydrochloride was synthesized stereospecifically from commercially available (S)-(-)-1-Boc-2-piperidinecarboxylic acid in four steps without disturbing the chiral center, and the absolute configuration of (-)-erythro-mefloquine hydrochloride was unambiguously determined as (11R,12S). (11S,12R)-(+)-erythro-Mefloquine hydrochloride was synthesized utilizing [(S,S)-TsDpen]Ru(p-cymene)Cl complexes-catalyzed enantioselective transfer hydrogenation of pyridyl ketone 7 as the key step, and the sense of asymmetric induction of 2-pyridyl ketone 7 is opposite to that of normal ketones in the transfer hydrogenation. Our results confirm the correctness of the determination of the absolute configuration by three physical chemistry methods, and, unbelievably, the erroneous assignments by all previous five asymmetric syntheses. Copyright
- Zhou, Gang,Liu, Xian,Liu, Xueying,Nie, Huifang,Zhang, Shengyong,Chen, Weiping
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Read Online
- Racemic and enantiopure 4-(piperidine-2′-yl)-pyridazines: Novel synthesis of anabasine-analogues with potential nicotinic acetylcholine receptor agonist activity - A new approach via Diels-Alder reaction with inverse electron demand
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A novel multistep synthesis of anabasine analogues bearing a bioisosteric pyridazine moiety instead of a pyridine nucleus in 2-position of the piperidine ring of the alkaloid is described. Starting materials are racemic 2-hydroxymethyl-piperidine, racemic pipecolic acid or (S)-(-)-piperidine-1,2-dicarboxylic-acid-1-tert-butyl ester. Key step of this synthetic approach is a Diels-Alder cycloaddition process with inverse electron demand utilizing diverse 1,2,4,5-tetrazines as electron-deficient dienes and the new racemic or enantiopure 2-(2′-methoxyethenyl)-piperidine as electron-rich dienophile. In this [4+2]-cycloadditions 1,2,4,5-tetrazines serve as synthons for introducing the pyridazine ring in the 2-position of the piperidine moiety.
- Stehl, Astrid,Seitz, Gunther,Schulz, Karen
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Read Online
- Synthesis of a model compound of corydendramine a via a julia coupling
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The synthesis of the tetraenylpiperidine 12, which has the same core structure as the natural product corydendramine A, has been completed in eight steps starting from 2-piperidinemethanol 3 and trans,trans-2,6-nonadienal 6. The key step of the synthesis was a Julia coupling of sulfone (10) with aldehyde (5) to form a conjugated triene.
- McCrea-Hendrick, Maddy,Nichols, Christopher J.
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Read Online
- A fit for purpose synthesis of Bruton's tyrosine kinase inhibitor GDC-0852
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The development of an expedient synthesis to GDC-0852 (1), a reversible BTK inhibitor drug candidate, is described. The key starting material tricyclic lactam 5 was prepared by an annulation reaction of unprotected piperidine-2-carbaldehyde HCl salt (20) and N-Boc piperidine-2,4-dione 21 in a safe and scalable manner. A highly selective Pd-catalyzed C[sbnd]N coupling of lactam 5 and linker 2a, followed by Suzuki?Miyaura coupling to fragment 8 subsequently provided a direct and convergent access to the penultimate 17. A simple NaBH4 aldehyde reduction completed the synthesis to GDC-0852 (1) in high yield (54% over 3 steps from 5) and purity (99.0 A% HPLC).
- Lim, Ngiap-Kie,Zhang, Haiming,Sowell, C. Gregory,Gosselin, Francis
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Read Online
- X-ray Structure-Guided Discovery of a Potent, Orally Bioavailable, Dual Human Indoleamine/Tryptophan 2,3-Dioxygenase (hIDO/hTDO) Inhibitor That Shows Activity in a Mouse Model of Parkinson’s Disease
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Human indoleamine 2,3-dioxygenase 1 (hIDO1) and tryptophan 2,3-dioxygenase (hTDO) have been closely linked to the pathogenesis of Parkinson’s disease (PD); nevertheless, development of dual hIDO1 and hTDO inhibitors to evaluate their potential efficacy against PD is still lacking. Here, we report biochemical, biophysical, and computational analyses revealing that 1H-indazole-4-amines inhibit both hIDO1 and hTDO by a mechanism involving direct coordination with the heme ferrous and ferric states. Crystal structure-guided optimization led to23, which manifested IC50values of 0.64 and 0.04 μM to hIDO1 and hTDO, respectively, and had good pharmacokinetic properties and brain penetration in mice.23showed efficacy against the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced mouse motor coordination deficits, comparable to Madopar, an anti-PD medicine. Further studies revealed that different from Madopar,23likely has specific anti-PD mechanisms involving lowering IDO1 expression, alleviating dopaminergic neurodegeneration, reducing inflammatory cytokines and quinolinic acid in mouse brain, and increasing kynurenic acid in mouse blood.
- Ning, Xiang-Li,Li, Yu-Zhi,Huo, Cui,Deng, Ji,Gao, Cheng,Zhu, Kai-Rong,Wang, Miao,Wu, Yu-Xiang,Yu, Jun-Lin,Ren, Ya-Li,Luo, Zong-Yuan,Li, Gen,Chen, Yang,Wang, Si-Yao,Peng, Cheng,Yang, Ling-Ling,Wang, Zhou-Yu,Wu, Yong,Qian, Shan,Li, Guo-Bo
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p. 8303 - 8332
(2021/06/30)
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- A One-Pot Iodo-Cyclization/Transition Metal-Catalyzed Cross-Coupling Sequence: Synthesis of Substituted Oxazolidin-2-ones from N-Boc-allylamines
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A one-pot iodo-cyclization/transition metal-catalyzed cross-coupling sequence is reported to access various C5-functionalized oxazolidin-2-ones from unsaturated N-Boc-allylamines. Depending on the Grignard reagents used for the cross-coupling, e.g., aryl- or cyclopropylmagnesium bromide, a cobalt or copper catalyst has to be used to obtain the functionalized oxazolidin-2-ones in good yields.
- Chaumont-Olive, Pauline,Cossy, Janine
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supporting information
(2020/05/14)
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- Compound, preparation method thereof, pharmaceutical composition and application of compound
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The invention discloses a compound, a preparation method thereof, a pharmaceutical composition and application of the compound. The compound I, and a stereoisomer or a pharmacologically acceptable salt thereof can serve as a CDK7 kinase inhibitor, are high in inhibition activity, and can be used for treatment of various malignant tumors.
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Paragraph 0294; 0296-0298
(2020/01/03)
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- COMPOUNDS, COMPOSITIONS AND METHODS FOR SYNTHESIS
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The present disclosure, among other things, provides technologies for synthesis, including reagents and methods for stereoselective synthesis. In some embodiments, the present disclosure provides compounds useful as chiral auxiliaries. In some embodiments, the present disclosure provides reagents and methods for oligonucleotide synthesis. In some embodiments, the present disclosure provides reagents and methods for chirally controlled preparation of oligonucleotides. In some embodiments, technologies of the present disclosure are particularly useful for constructing challenging internucleotidic linkages, providing high yields and stereoselectivity.
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Paragraph 00663; 00664; 00667; 00668; 00691; 00698; 00699
(2019/01/10)
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- Protecting-Group-Directed Regio- and Stereoselective Oxymercuration-Demercuration: Synthesis of Piperidine Alkaloids Containing 1,2- and 1,3-Amino Alcohol Units
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An efficient synthesis of naturally occurring 1,2- and 1,3-amino alcohol unit containing 2-substituted piperidine alkaloids and their analogues has been developed from l -pipecolinic acid. The protocol describes the regio- and stereoselective oxymercuration-demercuration of 2-alkenyl piperidines based on protecting groups to give piperidine alkaloids as a key step.
- Bugde, Sandesh T.,Volvoikar, Prajesh S.,Tilve, Santosh G.
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p. 1113 - 1122
(2017/12/06)
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- SUBSTITUTED AMINO TRIAZOLES USEFUL AS HUMAN CHITINASE INHIBITORS
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Disclosed are amino triazole compounds substituted with a piperidinyl ring that is itself substituted with a heterocyclic ring. These compounds are inhibitors of acidic mammalian chitinase and chitotriosidase. Also disclosed are methods of using the compounds to treat asthma reactions caused by allergens, as well as acute and chronic inflammatory diseases, autoimmune diseases, dental diseases, neurologic diseases, metabolic diseases, liver diseases, polycystic ovary syndrome, endometriosis, and cancer.
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Page/Page column 147; 148
(2017/03/21)
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- As hepatitis c inhibitor spiro compound and its use in medicine
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The invention provides a spiro compound serving as a hepatitis c inhibitor and application thereof in a medicine. The compound is a compound as shown in a formula (I) or a stereisomer, a geometric isomer, a tautomer, nitric oxide, an aquo-complex, a solvate, a metabolite, pharmaceutically acceptable salt or prodrug of the compound as shown in the formula (I). The invention also provides a pharmaceutical composition containing the compound, application of the compound and the pharmaceutical composition in inhibition of HCV (Hepatitis C Virus) copy and HCV virus protein, as well as the application of the compound and the pharmaceutical composition in prevention, handling, treatment or relieving of HCV infection or hepatitis c disease for a patient. The formula I is as shown in the specification.
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Paragraph 1195; 1199; 1200
(2017/12/28)
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- One-Pot Three-Component Synthesis of Vicinal Diamines via In Situ Aminal Formation and Carboamination
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A synthesis of vicinal diamines via in situ aminal formation and carboamination of allyl amines is reported. Employing highly electron-poor trifluoromethyl aldimines in their stable hemiaminal form was key to enable both a fast and complete aminal formation as well as the palladium-catalyzed carboamination step. The conditions developed allow the introduction of a wide variety of alkynyl, vinyl, aryl, and hetereoaryl groups with complete regioselectivity and high diastereoselectivity. The reaction exhibits a high functional-group tolerance. Importantly, either nitrogen atom of the imidazolidine products can be selectively deprotected, while removal of the aminal tether can be achieved in a single step under mild conditions to reveal the free diamine. We expect that this work will promote the further use of mixed aminal tethers in organic synthesis.
- Orcel, Ugo,Waser, Jerome
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supporting information
p. 12881 - 12885
(2016/10/04)
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- PROCESS FOR MAKING TRICYCLIC LACTAM COMPOUNDS
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Processes are described for the preparation of tricyclic lactam compound of Formula (I), having the structure and intermediates useful for the preparation of (I).
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Page/Page column 14-15
(2016/05/19)
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- COMPOUNDS AND USE FOR TREATING CANCER
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The present invention relates to certain 2,4-disubstituted quinoline derivatives, to their therapy, as well as to pharmaceutical compositions comprising said compounds. More specifically the invention relates to certain 2,4-disubstituted quinoline derivatives or pharmaceutical compositions comprising said compounds for the treatment of cancers characterized by overactive Ras and/or Rac or signalling pathway.
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- Benzimidazole-2-piperazine compound, its pharmaceutical composition and its preparation and use
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The invention relates to a benzimidazole-2-piperazine derivative and a preparing method and application of the benzimidazole-2-piperazine derivative in medicine, in particular to a novel benzimidazole-2-piperazine derivative shown in the general formula (I), a preparing method of the derivative, a pharmaceutical composition containing the derivative and application of the derivative serving as a therapeutic agent, especially serving as a poly (ADP-ribose) polymerase (PARP) inhibitor. In the general formula (I), R refers to hydrogen or halogen, G refers to carbonyl or methylene, m is 1-2, n is 1-3, and Q refers to hydrogen or C1-C4 alkyl. When X is methylene and Y is NR1 or methylene, X is NR1; R1 refers to hydrogen, C1-C6 alkyl, benzyl, COR2 or SO2R2; R2 refers to the following groups which are not substituted or groups substituted by 1-3 substituent groups, including C1-C6 alkyl, C3-C8 naphthenic base, phenyl, benzyl, naphthyl and C5-C10 aromatic heterocycle base, heterocycle in the C5-C10 aromatic heterocycle base comprises 1-3 heteroatoms selected from N, O and S, and the substituent groups are selected from the following atoms or groups of C1-C6 alkyl, C1-C6 alkoxy, halogen, amidogen, nitryl, sulfydryl, hydroxyl, cyanogroup and trifluoromethyl. The general formula (I) is shown in the specification.
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Paragraph 0209; 0363; 0366; 0367
(2016/10/20)
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- PYRIDINE- AND PYRIMIDINECARBOXAMIDES AS CXCR2 MODULATORS
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There is disclosed pyridine-and pyrimidinecarboxamide compounds useful as pharmaceutical agents, synthesis processes, and pharmaceutical compositions which include pyridine-and pyrimidinecarboxamides compounds. More specifically, there is disclosed a genus of CXCR2 inhibitor compounds that are useful for treating a variety of inflammatory and neoplastic disorders.
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Paragraph 0173
(2015/11/27)
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- Design and synthesis of fused tetrahydroisoquinoline-iminoimidazolines
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In the aim of identifying new privileged structures, we describe the 5-steps synthesis of cyclic guanidine compounds "tetrahydroisoquinoline-iminoimidazolinesg" derived from tetrahydroisoquinoline-hydantoin core. In order to evaluate this new minimal structure and the impact of replacing a carbonyle by a guanidine moiety, their affinity towards adenosine receptor A2A was evaluated and compared to those of tetrahydroisoquinoline-hydantoin compounds.
- Moas-Héloire, Valeria,Renault, Nicolas,Batalha, Vania,Arias, Angela Rincon,Marchivie, Mathieu,Yous, Said,Deguine, Noémie,Buée, Luc,Chavatte, Philippe,Blum, David,Lopes, Luisa,Melnyk, Patricia,Agouridas, Laurence
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- A strategy for complex dimer formation when biomimicry fails: Total synthesis of ten coccinellid alkaloids
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Although dimeric natural products can often be synthesized in the laboratory by directly merging advanced monomers, these approaches sometimes fail, leading instead to non-natural architectures via incorrect unions. Such a situation arose during our studies of the coccinellid alkaloids, when attempts to directly dimerize Natures presumed monomeric precursors in a putative biomimetic sequence afforded only a non-natural analogue through improper regiocontrol. Herein, we outline a unique strategy for dimer formation that obviates these difficulties, one which rapidly constructs the coccinellid dimers psylloborine A and isopsylloborine A through a terminating sequence of two reaction cascades that generate five bonds, five rings, and four stereocenters. In addition, a common synthetic intermediate is identified which allows for the rapid, asymmetric formal or complete total syntheses of eight monomeric members of the class.
- Sherwood, Trevor C.,Trotta, Adam H.,Snyder, Scott A.
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supporting information
p. 9743 - 9753
(2014/07/22)
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- A concise diastereoselective approach to (+)-dexoxadrol, (-)-epi-dexoxadrol, (-)-conhydrine and (+)-lentiginosine from (-)-pipecolinic acid
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A new diastereoselective pathway for the total synthesis of (+)-dexoxadrol, first asymmetric synthesis of (-)-epi-dexoxadrol and formal synthesis of conhydrine and (+)-lentiginosine is presented using commercially available (-)-pipecolinic acid. The key reactions utilized are Sharpless asymmetric dihydroxylation and Wittig reaction. The paper further describes the study of effect of protecting groups on dihydroxylation of a terminal olefin in piperidine ring system.
- Bhat, Chinmay,Tilve, Santosh G.
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p. 10876 - 10883
(2014/01/06)
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- L-Proline derived nitrogenous steroidal systems: An asymmetric approach to 14-azasteroids
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An efficient chiral pool approach using l-proline to access 14-azasteroids under mild reaction conditions has been described. The key step involves the intramolecular SN2′ cyclization reaction for the construction of critical C-ring in the nitrogen impregnated steroidal architectures bearing unsaturation at Δ9(11) position. In the endeavour to synthesize some new congeners, the remote electronic impact of the electron donating groups in A ring and heteroatoms like oxygen in B ring, on the propensity of C-ring cyclization was also observed.
- Singh, Ritesh,Panda, Gautam
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p. 19533 - 19544
(2013/10/22)
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- Henry-Nef reaction: A practical and versatile chiral pool route to 2-substituted pyrrolidine and piperidine alkaloids
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The paper describes the synergistic protocol developed by combinatorial Henry and Nef reaction for the synthesis of 2-substituted pyrrolidine and piperidine alkaloids containing 1,3-aminoketone and 1,3-amino alcohol units. The utility of the protocol is demonstrated by asymmetric synthesis of 12 natural products of which asymmetric synthesis of (-)-N-methylpelletierine is presented for the first time. The one-carbon homologation described also provides an alternate route for the synthesis of key intermediates homoprolinol and homopipecolinol used as synthetic precursors for several alkaloids and construction of β-amino acids from α-amino acids.
- Bhat, Chinmay,Tilve, Santosh G.
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p. 6129 - 6143
(2013/07/27)
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- SUBSTITUTED ADIPIC ACID AMIDES AND USES THEREOF
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The present invention provides compounds of Formula (I), or a pharmaceutically acceptable salt thereof, wherein A is a five to eight membered monocyclic or a nine to twelve membered bicyclic heterocyclic ring, as further defined herein; Y is S, CH2, or CH; Z is CH or N; R7 and R9 are hydrogen or (C1-C6)alkyl; R2 is (C1 C6)alkoxy, OH, CN, (C1-C6)alkyl, halogen, or CF3; r and s are 0, 1, or 2; and R1 and R3 are as further defined herein. These compounds are agonists, partial agonists and/or modulators of the NPY4 receptor and may be used for the treatment and prophylaxis of obesity, food intake, and other diseases and conditions modulated by the NPY4 receptor.
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Page/Page column 123
(2012/10/07)
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- An expedient total synthesis of optically active piperidine and indolizidine alkaloids (-)-β-conhydrine and (-)-lentiginosine
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Attempts directed toward the stereocontroled total synthesis of piperidine and indolizidine alkaloids resulted in the synthesis of (-)-β-conhydrine 1 and (-)-lentiginosine 3. The synthesis of 1 and 3 were developed from protected d-mannitol as the chiral
- Kamal, Ahmed,Vangala, Saidi Reddy
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p. 1341 - 1347
(2011/04/12)
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- Hit-to-lead optimization of disubstituted oxadiazoles and tetrazoles as mGluR5 NAMs
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Here we report the discovery and early SAR of a series of mGluR5 negative allosteric modulators (NAMs). Starting from a moderately active HTS hit we synthesized 3,5-disubstituted-oxadiazoles and tetrazoles as mGluR5 NAMs. Based on the analysis of ligand e
- Wágner, Gábor,Wéber, Csaba,Nyéki, Olga,Nógrádi, Katalin,Bielik, Attila,Molnár, László,Bobok, Amrita,Horváth, Attila,Kiss, Béla,Kolok, Sándor,Nagy, József,Kurkó, Dalma,Gál, Krisztina,Greiner, István,Szombathelyi, Zsolt,Keser, Gy?rgy M.,Domány, Gy?rgy
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scheme or table
p. 3737 - 3741
(2010/08/20)
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- Pyridine- and Pyrimidinecarboxamides as CXCR2 Modulators
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There is disclosed pyridine- and pyrimidinecarboxamide compounds useful as pharmaceutical agents, synthesis processes, and pharmaceutical compositions which include pyridine- and pyrimidinecarboxamides compounds. More specifically, there is disclosed a genus of CXCR2 inhibitor compounds that are useful for treating a variety of inflammatory and neoplastic disorders.
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Page/Page column 48
(2010/08/22)
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- Synthesis of 6- and 7-membered cyclic enaminones: Scope and mechanism
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Six- and seven-membered cyclic enaminones can be prepared using common, environmentally benign reagents. Amino acids are used as synthetic precursors allowing diversification and the incorporation of chirality. The key reaction in this multistep process involves deprotection of Boc-amino ynones and subsequent treatment with methanolic K2CO3 to induce cyclization. A β-amino elimination side reaction was identified in a few labile substrates that led to either loss of stereochemical purity or degradation. This process can be mitigated in specific cases using mild deprotection conditions. NMR and deuterium-labeling experiments provided valuable insight into the workings and limitations of this reaction. Although disguised as a 6-endo-dig cyclization, the reagents employed in the transformation play a direct role in bond-making and bond-breaking, thus changing the mode of addition to a 6-endo-trig cyclization. This method can be used to construct an array of monocyclic and bicyclic scaffolds, many of which are found in well-known natural products (e.g., indolizidine, quinolizidine, and Stemona alkaloids).
- Niphakis, Micah J.,Turunen, Brandon J.,Georg, Gunda I.
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supporting information; scheme or table
p. 6793 - 6805
(2010/12/20)
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- Enantioselective Synthesis of (+)-α-Conhydrine and (-)-Sedamine by L-ProlineCatalysed α-Aminooxylation
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An efficient organocatalytic approach to the enantioslective synthesis of two important piperidine alkaloids, namely (+)α-conhydrine (98% ee) and (-)-sedamine (95 % ee), by L-pro-line-catalysed α-aminooxylation of aldehydes has been developed. The strategy involves an intramolecular cyclization to construct the piperidine core.
- Shaikh, Tanveer Mahamadali,Sudalai, Arumugam
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experimental part
p. 3437 - 3444
(2010/08/20)
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- Inhibition of prolyl oligopeptidase with a synthetic unnatural dipeptide
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A new inhibitor, containing a linked proline-piperidine structure, for the enzyme prolyl oligopeptidase (POP) has been synthesised and demonstrated to bind covalently with the enzyme at the active site. This provides evidence that covalent inhibitors of P
- Racys, Daugirdas Tomas,Rea, Dean,Fueloep, Vilmos,Wills, Martin
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experimental part
p. 4775 - 4782
(2010/08/22)
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- A concise enantioselective synthesis of (+)-lentiginosine
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A high yielding enantioselective synthesis of the indolizidine alkaloid, (+)-lentiginosine, has been described based on asymmetric aza-Cope rearrangement and the l-proline catalyzed α-aminooxylation of aldehydes. The strategy also makes use of ring-closin
- Shaikh, Tanveer Mahamadali,Sudalai, Arumugam
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experimental part
p. 2287 - 2292
(2010/03/24)
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- Dynamic resolution of N-Boc-2-lithiopiperidine
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Dynamic thermodynamic resolution of N-Boc-2-lithiopiperidine is possible using a chiral ligand; the two enantiomers of this organolithium can be resolved with selectivities of up to 85: 15 from a selection of 26 chiral diamino-alkoxide ligands screened. The Royal Society of Chemistry.
- Coldham, Iain,Raimbault, Sophie,Chovatia, Praful T.,Patel, Jignesh J.,Leonori, Daniele,Sheikh, Nadeem S.,Whittaker, David T. E.
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experimental part
p. 4174 - 4176
(2009/03/11)
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- TETRAZOLE DERIVATIVES AS MODULATORS OF METABOTROPIC GLUTAMATE RECEPTORS
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The present invention relates to new compounds of formula (I) wherein Y1 and Y2 selected from the group consisting of hydrogen, halogen atom, C1-4 alkyl, C1-4 alkoxy or cyano group, X is oxygen or two hydrogen a
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Page/Page column 24
(2008/06/13)
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- ACYCLIC 1,4-DIAMINES AND USES THEREOF
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This invention relates to novel compounds useful in the treatment of diseases associated with TRPV4 channel receptor. More specifically, this invention relates to certain acyclic diamines, which are agonists of TRPV4 channel receptors.
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Page/Page column 49; 144-145
(2008/06/13)
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- MGLUR5 MODULATORS II
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The present invention is directed to novel compounds, to a process for their preparation, their use in therapy and pharmaceutical compositions comprising the novel compounds.
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Page/Page column 10
(2008/06/13)
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- MGluR5 modulators I
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The present invention is directed to novel compounds, to a process for their preparation, their use in therapy and pharmaceutical compositions comprising the novel compounds.
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Page/Page column 11
(2008/06/13)
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- FUSED THIOPHENE DERIVATIVES AS KINASE INHIBITORS
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A series of 5,6-dihydro-1-benzothiophen-7(4H)-one derivatives, and analogues thereof, which are substituted in the 2-position by an optionally substituted morpholin-4-yl moiety, being selective inhibitors of PI3 kinase enzymes, are accordingly of benefit in medicine, for example in the treatment of inflammatory, autoimmune, cardiovascular, neurodegenerative, metabolic, oncological, nociceptive or ophthalmic conditions.
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Page/Page column 57-58
(2008/06/13)
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- Novel gamma-lactams as beta-secretase inhibitors
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There is provided a series of novel substituted gamma-lactams of Formula (I) or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R1, R2, R4, R5 and R6 as defined herein, their ph
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Page/Page column 23
(2010/10/20)
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- AZOLE-BASED PHOSPHODIESTERASE INHIBITORS
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The present invention relates to phosphodiesterase (PDE) type IV selective inhibitors. Processes for the preparation of disclosed compounds of Formula (I), pharmaceutical compositions containing the compounds described herein and their use as PDE type IV selective inhibitors are provided.
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Page/Page column 60
(2010/11/24)
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- A concise synthesis of (±) and a total synthesis of (+)-epiquinamide
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A total synthesis of the quinolizidine alkaloid (+)-epiquinamide 1 has been achieved starting from (-)-pipecolinic acid 3. The key step is the highly diastereoselective addition of a TBDMS-protected propargyl alcohol to a chiral aldehyde derived from 3 to give erythro alkynol 19, which is then easily transformed into the desired bicyclic skeleton.
- Tong, Sok Teng (Amy),Barker, David
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p. 5017 - 5020
(2007/10/03)
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- The Baylis-Hillman reaction with chiral α-amino aldehydes under racemization-free conditions
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The Baylis-Hillman reaction with chiral α-amino aldehydes has been revisited. The reaction carried out under the influence of ultrasound avoids the aldehyde racemization almost completely, providing useful chiral substrates which can be used as starting materials for the synthesis of natural products. To demonstrate the synthetic applicability of these adducts, the easy preparation of a bicyclic lactam with an indolizidinic skeleton was accomplished. Georg Thieme Verlag Stuttgart.
- Coelho, Fernando,Diaz, Gaspar,Abella, Carlos A. M.,Almeida, Wanda P.
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p. 435 - 439
(2007/10/03)
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- TRICYCLIC COMPOUND, PROCESS FOR PRODUCING THE SAME, AND USE
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A compound of the formula: wherein R1 is a 5- or 6-membered ring; ???Z1 is a 5- or 6-membered aromatic ring; ???Z2 is a group of -Z2a-W2-Z2b-, wherein Z2a and Z2b are each O, S(O)q (wherein q is 0, 1 or 2), an imino group, or a bond; and W2 is an alkylene chain; ???W is a group represented by wherein R3 and R3' are each a hydrogen atom, a lower alkyl group, or a lower alkoxy group; X is CH or N; n and n' are each an integer of 0 or 1 to 4; m and m' are each 1 or 2; Y is O, S(O)p (wherein p is 0, 1 or 2), CH2 or NR4 (wherein R4 is a hydrogen atom, a lower alkyl group, or a lower acyl group); and ???R2 is (1) an amino group, in which the nitrogen atom may be converted to a quaternary ammonium or an oxide, or (2) a nitrogen-containing heterocyclic group which may contain a sulfur atom or an oxygen atom as the ring-constituting atom, in which the nitrogen atommay be converted to a quaternary ammonium or an oxide; or a salt thereof. The compound exhibits excellent CCR antagonist activity against CCR5, and is useful as a prophylactic and/or therapeutic agent for HIV infection in human peripheral blood mononuclear cells, especially for AIDS.
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Page/Page column 43-44
(2010/02/14)
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- Investigations concerning the organolanthanide and group 3 metallocene-catalyzed cyclization-functionalization of nitrogen-containing dienes
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Organolanthanide catalyzed cyclization-silylation of nitrogen-containing polyunsaturated systems allows access to core structures commonly found in naturally occurring alkaloids. Nitrogen-containing dienes with various substitution patterns were investigated. The method was most successful for substrates with terminal alkenes. Cyclization upon pendant 1,1-disubstituted olefins was not realized under various conditions. Interestingly, sterically hindered sulfonamides, which were previously believed to render the catalyst inactive, were actually compatible with the catalyst, thus affording the cyclized products after prolonged reaction times. Variations using fused ring systems were also investigated.
- Molander, Gary A.,Romero, Jan Antoinette C.
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p. 2631 - 2643
(2007/10/03)
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- POLYHETEROCYCLIC COMPOUNDS AND THEIR USE AS METABOTROPIC GLUTAMATE RECEPTOR ANTAGONISTS
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The present invention relates to new compounds of formula (I), wherein P, Q, X1, X2, X3, X4, X5, X6, R1, R2, R3, m, n, and p are as defined as in formula (I), or salts, or hydrates thereof, processes for their preparation and new intermediates used in the preparation thereof, pharmaceutical compositions containing said compounds and to the use of said compounds in therapy.
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Page/Page column 41
(2010/02/13)
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- NITROGENOUS HETEROCYCLIC DERIVATIVE HAVING 2,6-DISUBSTITUTED STYRYL
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The invention provides a novel nitrogen-containing heterocyclic derivative having 2,6-disubstituted styryl and a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising the nitrogen-containing heterocyclic derivative and a pharmaceutically acceptable salt thereof, in particular, a pharmaceutical composition effective as a sodium channel inhibitor, having an excellent analgesic action especially on neuropathic pain with minimized side effects.
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Page/Page column 48
(2010/02/14)
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- Synthesis and structure-activity relationships of novel IKK-β inhibitors. Part 2: Improvement of in vitro activity
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A series of 2-amino-3-cyano-4-alkyl-6-(2-hydroxyphenyl)pyridine derivatives was synthesized and evaluated as IκB kinase β (IKK-β) inhibitors. Substitution of an aminoalkyl group for the aromatic group at the 4-position on the core pyridine ring resulted i
- Murata, Toshiki,Shimada, Mitsuyuki,Kadono, Hiroshi,Sakakibara, Sachiko,Yoshino, Takashi,Masuda, Tsutomu,Shimazaki, Makoto,Shintani, Takuya,Fuchikami, Kinji,Bacon, Kevin B.,Ziegelbauer, Karl B.,Lowinger, Timothy B.
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p. 4013 - 4017
(2007/10/03)
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- Design and synthesis of conformationally constrained 3-(N-alkylamino) propylphosphonic acids as potent agonists of sphingosine-1-phosphate (S1P) receptors
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A series of conformationally constrained analogs of 3 were synthesized and evaluated as S1P receptor agonists. Several novel scaffolds were identified as suitable for further investigation. A series of conformationally constrained 3-(N-alkylamino)propylphosphonic acids were systematically synthesized and their activities as S1P receptor agonists were evaluated. Several pyrrolidine and cyclohexane analogs had S1P receptor profiles comparable to the acyclic lead compound, 3-(N-tetradecylamino)propylphosphonic acid (3), lowered circulating lymphocytes in mice after iv administration and were thus identified as being suitable for further investigations.
- Yan, Lin,Hale, Jeffrey J.,Lynch, Christopher L.,Budhu, Richard,Gentry, Amy,Mills, Sander G.,Hajdu, Richard,Keohane, Carol Ann,Rosenbach, Mark J.,Milligan, James A.,Shei, Gan-Ju,Chrebet, Gary,Bergstrom, James,Card, Deborah,Rosen, Hugh,Mandala, Suzanne M.
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p. 4861 - 4866
(2007/10/03)
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- Evaluation of pyrrolidin-2-imines and 1,3-thiazolidin-2-imines as inhibitors of nitric oxide synthase
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Syntheses and evaluation of pyrrolidin-2-imines and 1,3-thiazolidin-2- imines as inhibitors of nitric oxide synthase (NOS) are discussed. An extensive SAR was established for pyrrolidin-2-imines class of compounds. The amidines came out as the most potent inhibitors in addition to displaying selectivity.
- Shankaran,Donnelly, Karla L.,Shah, Shrenik K.,Guthikonda, Ravindra N.,MacCoss, Malcolm,Humes, John L.,Pacholok, Stephen G.,Grant, Stephan K.,Kelly,Wong
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p. 4539 - 4544
(2007/10/03)
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- A new general access to either type of securinega alkaloids: Synthesis of securinine and (-)-allonorsecurinine
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Matrix presented. The syntheses of securinine and (-)-allonorsecurinine have been achieved starting from easily available α-amino acid derivatives and using as key steps a RCM and a Heck reaction for the formation of rings D and C, respectively.
- Alibes, Ramon,Ballbe, Marta,Busque, Felix,De March, Pedro,Elias, Laia,Figueredo, Marta,Font, Josep
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p. 1813 - 1816
(2007/10/03)
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- Chemokine receptor binding heterocyclic compounds with enhanced efficacy
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The invention relates to heterocyclic compounds consisting of a core nitrogen atom surrounded by three pendant groups, wherein two of the three pendant groups are preferably benzimidazolyl methyl and tetrahydroquinolyl, and the third pendant group contains N and optionally contains additional rings. The compounds bind to chemokine receptors, including CXCR4 and CCR5, and demonstrate protective effects against infection of target cells by a human immunodeficiency virus (HIV).
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Page/Page column 12-13
(2010/02/03)
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- Rigidified acetylcholine mimics: Conformational requirements for binding to neuronal nicotinic receptors
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Rigidified derivatives have been designed and synthesized assuming the g+t conformer of acetylcholine (N-C-C-O=+60°, C-C-O-C=180°) as active conformation for binding to cytisine sensitive neuronal nicotinic receptors. The SAR of the compounds evaluated, along with those of more flexible analogues, support the g+t conformer hypothesis and highlight the stringent steric limitation of this nicotinic receptor sub-type. Compound 3e has low μM affinity for cytisine sensitive nicotinic receptor binding sites while being selective with regard to the α-bungarotoxin sensitive subclass. We also report few compounds with μM affinity for the α-bungarotoxin sensitive subclass.
- Villeneuve, Gerald,Cecyre, Danielle,Lejeune, Helene,Drouin, Marc,Lan, Ruoxi,Quirion, Remi
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p. 3847 - 3851
(2007/10/03)
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