81075-61-8Relevant academic research and scientific papers
Using the competing enantioselective conversion method to assign the absolute configuration of cyclic amines with BODE’s acylation reagents
Dooley, Charles J.,Burtea, Alexander,Mitilian, Christina,Dao, Wendy T.,Qu, Bo,Salzameda, Nicholas T.,Rychnovsky, Scott D.
, p. 10750 - 10759 (2020/10/02)
The competing enantioselective conversion (CEC) method is a quick and reliable means to determine absolute configuration. Previously, Bode’s chiral acylated hydroxamic acids were used to determine the stereochemistry of primary amines, as well as cyclic and acyclic secondary amines. The enantioselective acylation has been evaluated for 4-, 5-, and 6-membered cyclic secondary amines, including medicinally relevant compounds. The limitations of the method were studied through computational analysis and experimental results. Piperidines with substituents at the 2-position did not behave well unless the axial conformer was energetically accessible, which is consistent with the transition state geometries proposed by Bode and Kozlowski. Control experiments were performed to investigate the cause of degrading selectivity under the CEC reaction conditions. The present study expands the scope of the CEC method for secondary amines and provides a better understanding of the reaction profile.
Beta-carbolines V-type phosphodiesterase inhibitor and preparation method and usage thereof
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, (2019/01/23)
The invention provides a Beta-carbolines V-type phosphodiesterase inhibitor and a preparation method and a usage thereof. The Beta-carbolines V-type phosphodiesterase inhibitor has a structure as shown in a formula (X): the formula is as shown in the desc
Discovery of furyl/thienyl β-carboline derivatives as potent and selective PDE5 inhibitors with excellent vasorelaxant effect
Zheng, Hongbo,Wu, Yifeng,Sun, Bin,Cheng, Chuanle,Qiao, Yanan,Jiang, Yuehua,Zhao, Shengtian,Xie, Zhiyu,Tan, Jing,Lou, Hongxiang
, p. 767 - 780 (2018/09/25)
Based on our previous studies and predictive docking results, furans and thiophenes were introduced to the privileged tetrahydro-β-carboline scaffold to generate more potent and selective PDE5 inhibitors. A total of 66 novel furyl/thienyl tetrahydro-β-carboline derivatives were designed, synthesized and evaluated for PDE5 inhibition. Tetrahydro-β-carboline-piperazinedione 19f and tetrahydro-β-carboline-hydantoin 26b with optimized pendant 5-ethylfuran/5-ethylthiophene were identified as the most potent PDE5 inhibitors, and showed high selectivity towards PDE5 versus other PDE isozymes, especially PDE6 and PDE11. Further vasorelaxant activity assessments revealed that these PDE5 inhibitors also exhibited significant angiectasis on the norepinephrine-precontracted 3rd-order mesenteric arteries (110–150 μm) via NO–sGC–cGMP pathway, implying their further application for the treatment of vascular diseases.
Oxidative Rearrangement Coupling Reaction for the Functionalization of Tetrahydro-β-carbolines with Aromatic Amines
Ye, Jinxiang,Wu, Jianlei,Lv, Tingting,Wu, Guolin,Gao, Yu,Chen, Haijun
supporting information, p. 14968 - 14972 (2017/11/20)
The observation of an unexpected oxidative rearrangement coupling reaction led to the development of a novel method for the efficient functionalization of tetrahydro-β-carbolines (THβCs). The treatment of THβCs with photogenerated singlet oxygen (1O2) afforded unstable dioxetanes, which underwent further transformation to form new bonds in the presence of trifluoroacetic acid. This operationally simple protocol exhibits broad functional-group tolerance and is suitable for the late-stage functionalization of complex druglike molecules.
Novel Glycoprotein VI Antagonists as Antithrombotics: Synthesis, Biological Evaluation, and Molecular Modeling Studies on 2,3-Disubstituted Tetrahydropyrido(3,4-b)indoles
Bhunia, Shome S.,Misra, Ankita,Khan, Imran A.,Gaur, Stuti,Jain, Manish,Singh, Surendra,Saxena, Aaruni,Hohlfield, Thomas,Dikshit, Madhu,Saxena, Anil K.
, p. 322 - 337 (2017/04/26)
The development of small molecule inhibitors targeting GPVI has promising therapeutic role, as they inhibit arterial thrombosis with limited risk of bleeding. Among the compounds showing in vivo antithrombotic activity, the most active compound 6b (ED50 = 28.36 μmol/kg po in mice) showed improved inhibition for collagen (IC50 = 6.7 μM), CRP-XL (IC50 = 53.5 μM), and convulxin (CVX) (IC50 = 5.7 μM) mediated platelet aggregation as compared to losartan (LOS) (collagen, IC50 = 10.4 μM; CRP-XL, IC50 = 158 μM; CVX, IC50 = 11 μM) than any of its enantiomers S (6c) (collagen, IC50 = 25.3 μM; CRP-XL, IC50 = 181.4 μM; CVX, IC50 = 9 μM) and R (6d) (collagen, IC50 = 126.3 μM; CRP-XL, IC50 > 500 μM; CVX, IC50 = 86.8 μM). Compound 6b also inhibited platelet P-selectin expression and thus may diminish atherosclerosis. The molecular interactions of both enantiomers 6c and 6d at the GPVI receptor have been explained through docking studies.
(R/S)-BINOL-α-phosphoryloxy enecarbamate-mediated and (R/S)-Titanium(IV) BINOLates-catalyzed enantioselective intramolecular heck/aza-diels-alder cycloaddition (IHADA): An expedient methodology
Khan, Imran A.,Saxena, Anil K.
supporting information, p. 2617 - 2626 (2013/10/21)
An (R/S)-titanium(IV) BINOLate-catalyzed highly enantioselective intramolecular Heck/aza-Diels-Alder cycloaddition (IHADA) cascade was developed to prepare tetrahydropyridoindoles (tHPs) and octahydropyrazinopyridoindoles (oHPPs) from in situ generated (R/S)-BINOL α-phosphoryloxy carbamate (αPPC2) in one pot. Chiral cooperativity between (R/S)-αPPC2 and (R/S)-titanium(IV) BINOLate was observed and successfully utilized for the construction of various tHPs (7 examples) and oHPPs (17 examples). Copyright
Design, synthesis, and biological evaluation of callophycin A and analogues as potential chemopreventive and anticancer agents
Shen, Li,Park, Eun-Jung,Kondratyuk, Tamara P.,Guendisch, Daniela,Marler, Laura,Pezzuto, John M.,Wright, Anthony D.,Sun, Dianqing
experimental part, p. 6182 - 6195 (2011/12/15)
Callophycin A was originally isolated from the red aμgae Callophycus oppositifolius and shown to mediate anticancer and cytotoxic effects. In our collaborative effort to identify potential chemopreventive and anticancer agents with enhanced potency and se
ENZYME INHIBITORS
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Page/Page column 48, (2008/06/13)
Compounds of formula (I) are inhibitors of histone deacetylase activity, and are useful in the treatment of, for example, cancers, wherein R1 is a carboxylic acid group (-COOH), or an ester group which is hydrolysable by one or more intracellular carboxyesterase enzymes to a carboxylic acid group; R2is the side chain of a natural or non-natural alpha amino acid; Y is a bond, -C(=O)-, -S(=O)2-, -C(=O)O-, -C(O)NR3-, -C(=S)-NR3 , -C(=NH)NR3 or -S(=O)2NR3- wherein R3 is hydrogen or optionally substituted C1-C6 alkyl; L1 is a divalent radical of formula -(Alk1)m(Q)n(Alk2)p- wherein m, n and p are independently 0 or 1 , Q is (i) an optionally substituted divalent mono- or bicyclic carbocyclic or heterocyclic radical having 5 - 13 ring members, or (ii), in the case where both m and p are 0, a divalent radical of formula -X2-Q1- or -Q1-X2- wherein X2 is -O-, S- or NRA- wherein RA is hydrogen or optionally substituted C1-C3 alkyl, and Q1 is an optionally substituted divalent mono- or bicyclic carbocyclic or heterocyclic radical having 5 - 13 ring members, AIk1 and AIk2 independently represent optionally substituted divalent C3-C7 cycloalkyl radicals, or optionally substituted straight or branched, C1-C6 alkylene, C2-C6 alkenylene ,or C2-C6 alkynylene radicals which may optionally contain or terminate in an ether (-O-), thioether (-S-) or amino (-NRA-) link wherein RA is hydrogen or optionally substituted C1-C3 alkyl; X1 represents a bond; -C(=O); or -S(=O)2-; -NR4C(=O)-, -C(=O)NR4-, -NR4C(=O)NR5- , -NR4S(=O)2-, or -S(=O)2NR4-wherein R4 and R5 are independently hydrogen or optionally substituted C1-C6 alkyl; z is 0 or 1 ; A represents an optionally substituted mono-, bi- or tri-cyclic carbocyclic or heterocyclic ring system wherein the radicals R1R2NH-Y-L1-X1-[CH2]Z- and HONHCO-[LINKER]- are attached different ring atoms; and -[Linker]- represents a divalent linker radical linking a ring atom in A with the hydroxamic acid group CONHOH, the length of the linker radical, from the terminal atom linked to the ring atom of A to the terminal atom linked to the hydroxamic acid group, is equivalent to that of an unbranched saturated hydrocarbon chain of from 3-10 carbon atoms.
Synthesis, molecular modeling and QSAR studies in chiral 2,3-disubstituted-1,2,3,4-tetrahydro-9H-pyrido(3,4-b)indoles as potential modulators of opioid antinociception
Saxena, Anil K,Pandey, Suresh K,Tripathi, Ravish C,Raghubir, Ram
, p. 1559 - 1570 (2007/10/03)
In view of coexistence of opioid and cholecystokinin (CCK) in the brain areas concerned with pain processing, some semirigid racemic and chiral anlogues of a potent CCK receptor antagonist (benzotript) have been synthesized and tested for their modulatory
Some 3-carboxamides of β-carboline and tetrahydro-β-carboline
Couts, Ronald T.,Micetich, Ronald G.,Baker, Glen B,Benderly, Abraham,Dewhurst, Tim,et al.
, p. 131 - 142 (2007/10/02)
A series of tetrahydro-β-carboline-3-carboxamides (L- and D-series) was made by the interaction of the respective amine with the appriopriate methyl tetrahydro-β-carboline-3-carboxylate.The β-carboline-3-carboxamides were prepared by a similar route from methyl β-carboline-3-carboxylate or by aromatization of the respective tetrahydro-β-carboline-3-carboxamide.The diastereomers of N-sec-butyl tetrahydro-β-carboline-3-carboxamide (L- and D-series) were separated by chromatography.
