- Design, synthesis and biological evaluation of novel 5-phenyl-1H-pyrazole derivatives as potential BRAFV600E inhibitors
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A series of novel 5-phenyl-1H-pyrazole derivatives (5a-5u) containing niacinamide moiety were synthesized and evaluated for biological activity as potential BRAFV600E inhibitors. Among them, compound 5h exhibited the most potent inhibitory activity with an IC50 value of 0.33 μM for BRAFV600E. Antiproliferative assay results indicated that compound 5h has better antiproliferative activity against WM266.4 and A375 in vitro with IC50 value of 2.63 and 3.16 μM, respectively, being comparable with the positive control vemurafenib. Molecular docking of 5h into the BRAFV600E active site was performed to determine the probable binding mode. Furthermore, molecular docking and 3D QSAR study by means of DS 3.5 (Discovery Studio 3.5, Accelrys, Co. Ltd) explored the binding modes and the structure and activity relationship (SAR) of these derivatives.
- Wang, Shu-Fu,Zhu, Yin-Ling,Zhu, Ping-Ting,Makawana, Jigar A.,Zhang, Ya-Liang,Zhao, Meng-Yue,Lv, Peng-Cheng,Zhu, Hai-Liang
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Read Online
- Synthesis and biological evaluation of novel N-(5-phenyl-1H-pyrazol-3-yl)benzenesulfonamide derivatives as potential BRAFV600E inhibitors
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A series of novel N-(5-phenyl-1H-pyrazol-3-yl)benzenesulfonamide derivatives (5a–5l) were synthesized and developed as potential BRAFV600E inhibitors. Among them, compound 5l exhibited the most potent inhibitory activity with an IC50
- Gong, Zhen-Hua,Yao, Jian,Ji, Jian-Feng,Yang, Jun,Xiang, Tie,Zhou, Chang-Kai
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Read Online
- Synthesis of Pyrazole Compounds by Using Sonication Method
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A simple method for the synthesis of pyrazoles derivatives carried out by cyclization of cyanide with hydrazine hydrate by using sonication method. All the prepared compounds were characterized by 1H, 13C NMR and IR Spectroscopy.
- Kumdale, Prashant Ganpatrao,Shitole, Nana Vikram
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p. 198 - 203
(2022/03/16)
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- From Stoichiometric Reagents to Catalytic Partners: Selenonium Salts as Alkylating Agents for Nucleophilic Displacement Reactions in Water
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The ability of chalcogenium salts to transfer an electrophilic moiety to a given nucleophile is well known. However, up to date, these reagents have been used in stoichiometric quantities, producing a substantial amount of waste as byproducts of the reaction. In this report, we disclose further investigation of selenonium salts as S-adenosyl-L-methionine (SAM) surrogates for the alkylation of nucleophiles in aqueous solutions. Most importantly, we were able to convert the stoichiometric process to a catalytic system employing as little as 10 mol % of selenides to accelerate the reaction between benzyl bromide and other alkylating agents with sodium cyanide in water. Probe experiments including 77Se NMR and HRMS of the reaction mixture have unequivocally shown the presence of the selenonium salt in the reaction mixture. (Figure presented.).
- Martins, Nayara Silva,ángel, Alix Y. Bastidas,Anghinoni, Jo?o M.,Lenard?o, Eder J.,Barcellos, Thiago,Alberto, Eduardo E.
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supporting information
p. 87 - 93
(2021/11/03)
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- Selective Synthesis of β-Ketonitriles via Catalytic Carbopalladation of Dinitriles
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A practical, convenient, and highly selective method of synthesizing β-ketonitriles from the Pd-catalyzed addition of organoboron reagents to dinitriles has been developed. This method provides excellent functional-group tolerance, a broad scope of substrates, and the convenience of using commercially available substrates. The method is expected to show further utility in future synthetic procedures.
- Zeng, Ge,Liu, Jichao,Shao, Yinlin,Zhang, Fangjun,Chen, Zhongyan,Lv, Ningning,Chen, Jiuxi,Li, Renhao
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p. 861 - 867
(2021/01/09)
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- Modular synthesis and antiproliferative activity of new dihydro-1H-pyrazolo[1,3-b]pyridine embelin derivatives
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A set of new dihydro-1H-pyrazolo[1,3-b]pyridine and pyrazolo[1,3-b]pyridine embelin derivatives was synthesized through a multicomponent reaction from natural embelin, 3-substituted-5-aminopyrazoles and aldehydes. The synthesized compounds were evaluated against three hematologic tumor cell lines, HEL (acute erythroid leukemia), K-562 (chronic myeloid leukemia) and HL-60 (acute myeloid leukemia), and five breast cancer cell lines (SKBR3, MCF-7, MDA-MB-231, BT-549, HS-578T). The primate non-malignant kidney Vero cell line was used as the control of cytotoxicity. From the obtained results, some structure–activity relationships were out-lined. Furthermore, in silico prediction of physicochemical properties and ADME parameters were determined for the derivatives with the best antiproliferative values.
- Amesty, ángel,Estévez-Braun, Ana,Fernández-Pérez, Leandro,Guerra, Borja,Guerra-Rodríguez, Miguel,Martín-Acosta, Pedro
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- Deadly KCN and pricey metal free track for accessing β-ketonitriles employing mild reaction conditions
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A one pot synthesis of β-ketonitriles from readily accessible 3-chloropropenals using economically benign iodine, aqueous ammonia and sodium hydroxide solution, employing mild reaction conditions have been described. This report presents a convenient, inexpensive, highly toxic-matter-free and eco-friendly approach for β-ketonitriles.
- Sharma, Pawan K.,Kumar, Rajiv,Ram, Sita,Chandak, Navneet
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p. 1847 - 1856
(2021/04/26)
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- AMIDE COMPOUND HAVING BET PROTEOLYSIS-INDUCING ACTION AND MEDICINAL APPLICATION THEREOF
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The present invention aims to provide a compound that: has an excellent cytotoxic action on cancer cells, excellent induction of BET protein degradation in cancer cells, and an excellent binding-inhibiting action on BET protein and acetylated histone; and is effective as an anti-cancer agent, a BET protein degradation-inducing agent, or a BET protein inhibiting agent. A compound indicated in general formula (I) or a pharmacologically acceptable salt thereof. {In the formula, each symbol is as outlined in the Description.}
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Paragraph 0216-0218
(2020/01/31)
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- One-Pot Four-Component Coupling Approach to Polyheterocycles: 6 H-Furo[3,2- f]pyrrolo[1,2- d][1,4]diazepine
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A novel polyheterocyclic chemical space, 6H-furo[3,2-f]pyrrolo[1,2-d][1,4]diazepine, was generated by a one-pot four-component coupling reaction where multiple bonds (three C-C, one C-O, and one C-N) were formed through a domino sequence. Two heterocyclic rings (furan and diazepine) were sequentially constructed from the monocyclic pyrrole derivative under environment-friendly reaction conditions to furnish the tricyclic fused scaffold.
- Yoon, Seok Hyun,Kim, Sung June,Kim, Ikyon
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p. 15082 - 15091
(2020/12/02)
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- Imidazolium-Based Ionic Network as a Robust Heterogeneous Catalyst in Synthesis of Phenacyl Derivatives
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A new imidazolium-based poly(ionic liquid) has been synthesized and used as a robust heterogeneous catalyst for the preparation of phenacyl derivatives by an SN2 reaction of different phenacyl bromides with a broad range of nucleophiles. The products are obtained in high yields under mild conditions. The catalyst can be recycled efficiently.
- Kakesh,Sayyahi,Badri,Tahanpesar
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p. 1218 - 1220
(2019/07/16)
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- Catalytic Activation of 1-Cyano-3,3-dimethyl-3-(1H)-1,2-benziodoxole with B(C6F5)3 Enabling the Electrophilic Cyanation of Silyl Enol Ethers
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The Lewis acidic activation of a hypervalent iodine reagent containing a transferable cyano group, 1-cyano-3,3-dimethyl-3-(1H)-1,2-benziodoxole (CDBX), with B(C6F5)3, to achieve the catalytic electrophilic cyanation of silyl enol ethers is presented. Mechanistic studies indicate that CDBX is activated through coordination of its cyano group to B(C6F5)3, thus enabling the electrophilic cyanation reaction to occur.
- Nagata, Takaya,Matsubara, Hiroki,Kiyokawa, Kensuke,Minakata, Satoshi
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supporting information
p. 4672 - 4675
(2017/09/12)
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- COMPOUNDS AND METHODS FOR THE TARGETED DEGRADATION OF BROMODOMAIN-CONTAINING PROTEINS
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The present invention relates to bifunctional compounds, which find utility as modulators of targeted ubiquitination, especially inhibitors of a variety of polypeptides and other proteins which are degraded and/or otherwise inhibited by bifunctional compounds according to the present invention. In particular, the present invention is directed to compounds, which contain on one end a VHL ligand which binds to the ubiquitin ligase and on the other end a moiety which binds a target protein such that the target protein is placed in proximity to the ubiquitin ligase to effect degradation (and inhibition) of that protein. The present invention exhibits a broad range of pharmacological activities associated with compounds according to the present invention, consistent with the degradation/inhibition of targeted polypeptides.
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Paragraph 00301; 00302
(2017/03/21)
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- 3-PHOSPHOGLYCERATE DEHYDROGENASE INHIBITORS AND USES THEREOF
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The present invention provides compounds, compositions thereof, and methods of using the same.
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Paragraph 00343; 00344
(2017/09/27)
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- One-pot synthesis of benzoylacetonitriles through sequential Pd-catalyzed carbonylation and decarboxylation
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Benzoylacetonitrile were prepared through sequential carbonylation and decarboxylation. The palladium-catalyzed carbonylation of aryl iodides and methyl cyanoacetate using Mo(CO)6 as a carbon monoxide source afforded beta-keto cyanoesters, and then the subsequent reaction with Li/H2O produced the desired benzoylacetonitriles.
- Lee, Sunwoo,Kim, Han-Sung,Min, Hongkeun,Pyo, Ayoung
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p. 239 - 242
(2015/12/31)
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- Integration of aqueous biphasic with magnetically recyclable systems: Polyethylene glycol-grafted Fe3O4 nanoparticles catalyzed phenacyl synthesis in water
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The present work trends to define an efficient phenacyl catalytic synthesis method employing a new nano-magnetite-supported organocatalyst. Polyethylene glycol (PEG) was bonded successfully onto silica coated ferrite and the resultant nanoparticles (PEG@SiO2@Fe3O4) characterized by fourier transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM), thermal gravimetric analysis (TGA), vibrating sample magnetometry (VSM), energy dispersive X-ray analysis (EDAX) and X-ray diffraction (XRD) that exhibited a good catalytic activity in the reaction. The nanoparticles could be easily separated from the reaction mixture by an external magnet and reused in seven reaction cycles without significant loss of activity.
- Amini, Atefeh,Sayyahi, Soheil,Saghanezhad, Seyyed Jafar,Taheri, Narges
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- Umpolung Strategy for Synthesis of β-Ketonitriles through Hypervalent Iodine-Promoted Cyanation of Silyl Enol Ethers
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An efficient method to synthesize β-ketonitriles from silyl enol ethers by an umploung hypervalent iodine(III)-CN species generated in situ from PhIO/BF3·Et2O/TMSCN has been developed for the first time. This method can be applied to structurally diverse aromatic and aliphatic substrates and further extended to preparation of bioactive compounds like 5-aminopyrazole and 5-aminoisoxazole.
- Shen, Hang,Li, Jiaqiang,Liu, Qing,Pan, Jing,Huang, Ruofeng,Xiong, Yan
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p. 7212 - 7218
(2015/07/28)
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- Synthesis, biological evaluation and 3D-QSAR studies of novel 5-phenyl-1 H -pyrazol cinnamamide derivatives as novel antitubulin agents
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A series of novel 5-phenyl-1H-pyrazol derivatives (5a-5x) containing cinnamamide moiety were synthesized and their biological activities as potential tubulin polymerization inhibitors were evaluated. Among them, compound 5j exhibited the most potent inhibitory activity with an IC50 value of 1.02 μ1/4M for tubulin, which was superior to that of Colchicine (IC50 Combining double low line 1.34 μ1/4M). Docking simulation was performed to insert compound 5j into the crystal structure of tubulin at colchicine binding site to determine the probable binding model. 3D-QSAR model was also built to provide more pharmacophore understanding that could be used to design new agents with more potent tubulin inhibitory activity.
- Wang, Shu-Fu,Yin, Yong,Zhang, Ya-Liang,Mi, Shan-Wei,Zhao, Meng-Yue,Lv, Peng-Cheng,Wang, Bao-Zhong,Zhu, Hai-Liang
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p. 291 - 299
(2015/03/04)
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- Specific 1,2-Hydride Shift in the Boron Trifluoride Catalyzed Reactions of Aromatic Aldehydes with Diazoacetonitrile: Simple Synthesis of β-Ketonitriles
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A series of β-ketonitriles was synthesized within 30 min under mild conditions through the BF3 ·OEt2-catalyzed addition reactions of diazoacetonitrile to aromatic aldehydes and subsequent 1,2-hydride shift. This method is advantageous in that it is operationally simple, mild and metal-free conditions are used, the substrate scope is wide, and the products are obtained in moderate to high yields (up to 81 %). Additionally, γ,δ-unsaturated β-ketonitriles are also accessible by this method by using cinnamaldehydes.
- Yang, Zhanhui,Son, Kwon-Il,Li, Siqi,Zhou, Bingnan,Xu, Jiaxi
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supporting information
p. 6380 - 6384
(2016/02/18)
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- Cascade synthesis of 3-aza-bicyclo[3.1.0]hex-2-ene derivatives from N-allyl enamines
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An efficient iodine-mediated cascade synthesis of 3-aza-bicyclo[3.1.0]hex-2-ene derivatives from easily prepared N-allyl enamines has been developed. The advantages of the reaction include facilitative preparation of substrates 3a-t, good functional group tolerance and transition-metal-free conditions.
- Zhai, Sheng-Xian,Dong, Hong-Ru,Chen, Zi-Bao,Hu, Yi-Ming,Dong, Heng-Shan
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p. 8405 - 8412
(2015/03/04)
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- Copper-catalyzed Aerobic Oxidative coupling of Aromatic Alcohols and Acetonitrile to β-Ketonitriles
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A practical, convenient, and cheap coppercatalyzed aerobic oxidative coupling of aromatic alcohols and acetonitrile to β-ketonitriles has been developed. The green C-C bond formation involving the loss of two hydrogen atoms from the corresponding two carbons, respectively, unlocks opportunities for markedly different synthetic strategies.
- Shen, Jiaxuan,Yang, Dejun,Liu, Yuxiao,Qin, Shuangshuang,Zhang, Jingwu,Sun, Jiangkai,Liu, Chunhui,Liu, Chaoyang,Zhao, Xiaomei,Chu, Changhu,Liu, Renhua
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supporting information
p. 350 - 353
(2014/04/03)
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- Synthesis, characterization and application of β-cyclodextrin-silica nanocomposite as potential microvessel in nucleophilic substitution reaction of phenacyl halides
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In the present study, β-cyclodextrin-silica hybrid is synthesized as a novel, efficient and eco-friendly microvessel and solid-liquid phase-transfer catalyst. This molecular host system was applied for nucleophilic substitution reaction of phenacyl halide
- Kiasat, Ali Reza,Nazari, Simin
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p. 429 - 438
(2014/01/06)
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- Palladium-catalyzed carbonylation with Mo(CO)for the synthesis of benzoylacetonitriles
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Benzoylacetonitriles were synthesized by the palladium-catalyzed carbonylation of aryl iodides and trimethylsilylacetonitrile using Mo(CO)as a carbon monoxide source. Pd(PPhCland CuFwere employed as the catalyst and activator, respectively. A variety of aryl iodides bearing alkyl, alkoxy, fluoro, chloro, bromo, nitrile, ester, and ketone groups afforded the corresponding benzoylacetonitriles in moderate to good yields. Georg Thieme Verlag Stuttgart ? New York.
- Pyo, Ayoung,Park, Ahbyeol,Jung, Hyunmin,Lee, Sunwoo
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supporting information
p. 2885 - 2888
(2012/10/29)
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- Synthesis and biological evaluation of 3-aryl-quinoxaline-2- carbonitrile 1,4-Di-N-oxide derivatives as hypoxic selective anti-tumor agents
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A series of 3-aryl-2-quinoxaline-carbonitrile 1,4-di-N-oxide derivatives were designed, synthesized and evaluated for hypoxic and normoxic cytotoxic activity against human SMMC-7721, K562, KB, A549 and PC-3 cell lines. Many of these new compounds displayed more potent hypoxic cytotoxic activity compared with TX-402 and TPZ in the tumor cells based evaluation, which confirmed our hypothesis that the replacement of the 3-amine with the substituted aryl ring of TX-402 increases the hypoxic anti-tumor activity. The preliminary SAR revealed that 3-chloro was a favorable substituent in the phenyl ring for hypoxic cytotoxicity and 7-methyl or 7-methoxy substituted derivatives exhibited better hypoxic selectivity against most of the tested cell lines. The most potent compound, 7-methyl-3-(3-chlorophenyl)-quinoxaline-2-carbonitrile 1,4-dioxide (9h) was selected for further anti-tumor evaluation and mechanistic study. It also exhibited significant cytotoxic activity against BEL-7402, HepG2, HL-60, NCI-H460, HCT-116 and CHP126 cell lines in hypoxia with IC50 values ranging from 0.31 to 3.16 μM, and preliminary mechanism study revealed that 9h induced apoptosis in a caspase-dependent pathway.
- Hu, Yunzhen,Xia, Qing,Shangguan, Shihao,Liu, Xiaowen,Hu, Yongzhou,Sheng, Rong
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p. 9683 - 9696
(2012/11/13)
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- Synthesis of benzoylacetonitriles from Pd-catalyzed carbonylation of aryl iodides and trimethylsilylacetonitrile
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Palladium-catalyzed carbonylation of aryl iodides and trimethylsilylacetonitrile to produce benzoylacetonitrile derivatives through a one-pot, three-component reaction is described. This preparation method provides good yields of the carbonylated products without any additional ligands. It has a broad substrate scope with a high tolerance for a variety of functional groups.
- Park, Ahbyeol,Lee, Sunwoo
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supporting information; experimental part
p. 1118 - 1121
(2012/03/27)
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- Phase transfer catalyst in grindstone synthesis of 3-oxopropanenitrile: One pot synthesis of polysubstituted amino thiophenes
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The chemoselective SN2 reaction of ω-bromoacetophenone with sodium cyanide or potassium cyanide in DMF-water or in biphasic solvent toluene-water using tetrabutylammonium bromide (TBAB) as phase-transfer catalyst, performed by grinding, furnished 3-oxopropanenitriles 2 as the sole product in 70-80% yield, while in ethanolwater, mixture of compound 2 and oxirane 3 were obtained. The obtained 3-oxopropanenitriles 2 were used for one pot synthesis of 2-amino-3-carbonitrile thiophenes.
- Patil, Shivaraj P.,Kanawade, Shrikant B.,Shinde, Madhukar P.,Toche, Raghunath B.
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- Tandem cross-Rauhut-Currier/cyclization reactions of activated alkenes to give densely functionalized 3,4-dihydropyrans
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A novel tandem cross-Rauhut-Currier/cyclization reaction between α,β-unsaturated ketones was developed. Using DABCO (20 mol %) as the catalyst, a series of densely functionalized 3,4-dihydropyrans were obtained in excellent yields and stereoselectivities (up to 98% yield, >99:1 dr). A tentative catalytic cycle was proposed with key intermediates confirmed by ESIMS studies.
- Liu, Wen,Zhou, Jing,Zheng, Changwu,Chen, Xingkuan,Xiao, Hua,Yang, Yingquan,Guo, Yinlong,Zhao, Gang
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supporting information; experimental part
p. 1768 - 1773
(2011/04/15)
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- Iridium diamine catalyst for the asymmetric transfer hydrogenation of ketones
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A simple and very efficient chiral aqua iridium(III) diamine complex leads to excellent enantioselectivities in the asymmetric transfer hydrogenation of various α-cyano and α-nitro ketones. The catalyst provides the ortho-substituted aromatic alcohols with especially high ee values. The diamine ligands can be used directly as chiral ligands; conversion into the corresponding sulfamide is not necessary.
- Vazquez-Villa, Henar,Reber, Stefan,Ariger, Martin A.,Carreira, Erick M.
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supporting information; experimental part
p. 8979 - 8981
(2011/11/30)
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- An efficient method for synthesis of phenacyl derivatives under homogeneous phase transfer catalyst condition in aqueous media
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In this letter, a mild and efficient procedure for synthesis of phenacyl derivatives under homogenous catalysis in the presence of tetrabutylammonium bromide in aqueous media is described. The nucleophilic substitution reactions were performed under ecofriendly conditions and gave the corresponding products in high yields and short reaction times.
- Sayyahi, Soheil,Saghanezhad, Jafar
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experimental part
p. 300 - 302
(2012/01/14)
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- COMPOUNDS FOR THE TREATMENT OF INFLAMMATORY DISORDERS
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This invention relates to compounds of the Formula (I): (Chemical formula should be inserted here as it appears on abstract in paper form) (I) or a pharmaceutically acceptable salt, solvate or isomer thereof, which can be useful for the treatment of diseases or conditions mediated by MMPs, ADAMs, TACE, aggrecanase, TNF- or combinations thereof.
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Page/Page column 115
(2010/06/11)
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- Design, synthesis, and evaluation of 2-aryl-7-(3′,4′-dialkoxyphenyl)-pyrazolo[1,5-a]pyrimidines as novel PDE-4 inhibitors
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Described herein is design, synthesis, and biological evaluation of novel series of 2-aryl-7-(3′,4′-dialkoxyphenyl)-pyrazolo[1,5-a]pyrimidines acting as inhibitors of type 4 phosphodiesterase (PDE4) which is known as a good target for the treatment of asthma and COPD. For this purpose, structure optimization was conducted with the aid of structure-based drug design using the known X-ray crystallography. Also, biological effects of these compounds on the target enzyme were evaluated by using in vitro assays, leading to the potent and selective PDE-4 inhibitor (IC50 10 nM).
- Kim, Ikyon,Song, Jong Hwan,Park, Chang Min,Jeong, Joon Won,Kim, Hyung Rae,Ha, Jin Ryul,No, Zaesung,Hyun, Young-Lan,Cho, Young Sik,Sook Kang, Nam,Jeon, Dong Ju
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scheme or table
p. 922 - 926
(2010/06/22)
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- 4-Cyanopyrazole-3-carboxamide derivatives, preparation, and application thereof
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The invention relates to 4-cyanopyrazole-3-carboxamide derivatives of formula (I): in which R1, R2, R3, R4, R5, R6, R7, R8 are as described herein. Also disclosed and
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Page/Page column 4-5
(2008/06/13)
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- PHENYL-SUBSTITUTED QUINOLINE AND QUINAZOLINE COMPOUNDS FOR THE TREATMENT OF DIABETES
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The invention relates to 2-phenyl-substituted quinoline and quinazoline compounds, pharmaceutical compositions, and methods for treating diabetes and related disorders.
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Page/Page column 102
(2010/10/20)
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- Arylpropanolamines incorporating an antioxidant function as neuroprotective agents
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A series of arylpropanolamines containing dipyrrolidinylpyrimidines as an antioxidant function have been synthesized and evaluated as dual function neuroprotective agents. Their in vitro efficacy as sodium channel blocking agents and antioxidants has been evaluated and compared with those of the ethanolamine derivative (1), which has been shown to be neuroprotective in a rat model of stroke. The ability of the present compounds to displace 3H-BTX toxin from sodium-ion channels in a rat brain membrane fraction was shown to be largely independent of the substituents on the aryl ring, which suggests that this activity may be mainly associated with the aminopyrimidine moiety. Structure-activity relationships for antioxidant efficacy were less clear, but the unsymmetrical pyrimidines were consistently more active than their symmetrical isomers. A brief theoretical investigation of this observation is reported.
- Joubran, Lida,Jackson, W. Roy,Campi, Eva M.,Robinson, Andrea J.,Wells, Bradley A.,Godfrey, Peter D.,Callaway, Jennifer K.,Jarrott, Bevyn
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p. 597 - 605
(2007/10/03)
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- Indium-mediated coupling of bromoacetonitriles with aromatic acyl cyanides: convenient synthesis of aromatic α-cyano ketones
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Indium-mediated coupling of bromoacetonitrile and 2-bromopropionitrile with a variety of aromatic acyl cyanides afforded the corresponding aromatic α-cyano ketones in moderate to good yields under mild and neutral conditions.
- Yoo, Byung Woo,Hwang, Sun Kyun,Kim, Dong Yoon,Choi, Jin Woo,Ko, Jae Jung,Choi, Kyung Il,Kim, Joong Hyup
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p. 4813 - 4816
(2007/10/03)
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- Phenyl-substituted cyclic enaminones
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The present invention relates to novel phenyl-substituted cyclic enaminones of the formula (I): in which Ar, X, Z, Y, K, n and m are each as defined in the description, to a plurality of processes and intermediates for their preparation and to their use as herbicides and pesticides.
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- Synthesis and biological effects of a new series of 2-amino-3-benzoylthiophenes as allosteric enhancers of A1-adenosine receptor
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New derivatives of PD 81,723, an allosteric enhancer of agonist binding to the A1-adenosine receptor, have been synthesized and evaluated in an intact cell assay. Compounds 3a, 3o and 3p appeared to be more potent than PD 81,723 and at a concentration of 0.1 μM caused significant reductions of cAMP content of CHO cells expressing the human A1-adenosine receptor. Compounds 4e and 4o appeared to be allosteric enhancers at a low concentration and antagonists at a higher concentration, whereas compounds 3c, 3g, 3s and 4l appeared to be weak antagonists that are also allosteric enhancers at the higher concentration of 10 μM. (C) 2000 Elsevier Science Ltd.
- Baraldi, Pier Giovanni,Zaid, Abdel Naser,Lampronti, Ilaria,Fruttarolo, Francesca,Pavani, Maria Giovanna,Tabrizi, Mojgan Aghazadhe,Shryock, John C.,Leung, Edward,Romagnoli, Romeo
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p. 1953 - 1957
(2007/10/03)
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- Allosteric modulation of the adenosine A1 receptor. Synthesis and biological evaluation of novel 2-amino-3-benzoylthiophenes as allosteric enhancers of agonist binding
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Novel allosteric enhancers of agonist binding to the rat adenosine A1 receptor are described. The lead compound for the new series was PD 81,723 ((2-amino-4,5-dimethyl-3-thienyl)[3-(trifluoromethyl)phenyl]methanone), a compound previously reported by Bruns and co-workers (Mol. Pharmacol. 1990, 38, 950-958). The 4,5-dimethyl group and the benzoyl moiety were targets for further modifications, leading to series of 4,5-dialkyl (12a-g), of tetrahydrobenzo (12h-u), and of tetrahydropyridine (13a-g) derivatives. A number of compounds, in particular 12b, 12e, 12j, 12n, and 12u, proved superior to PD 81,723. Their EC50 values for enhancing the binding of the adenosine A1 receptor agonist N6-cyclopentyladenosine to the receptor were lower, and/or their antagonistic activity on the adenosine A1 receptor was shown to be diminished.
- Van Der Klein, Pieter A. M.,Kourounakis, Angeliki P.,IJzerman, Ad P.
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p. 3629 - 3635
(2007/10/03)
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- Potential antiarthritic agents. II. Benzoylacetonitriles and β-aminocinnamonitriles
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Benzoylacetonitrile and β-aminocinnamonitrile are shown to possess potent intiinflammatory activity in the rat adjuvant arthritis model. In a series of phenyl-substituted analogues, only o-, m-, and p-fluorobenzoylacetonitrile and m- and p-fluoro-β-aminocinnamonitrile retained activity. Additionally, β-amino-2- and β-amino-3-thiopheneacrylonitrile and β-oxo-2- and β-oxo-3-thiophenepropionitrile exhibited similar activity. These agents are not believed to be acting via prostaglandin synthetase inhibition. The metabolic profile of benzoylacetonitrile is also described.
- Ridge,Hanifin,Harten,Johnson,Menschik,Nicolau,Sloboda,Watts
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p. 1385 - 1389
(2007/10/09)
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