Synthesis of novel potent hepatitis C virus NS3 protease inhibitors: Discovery of 4-hydroxy-cyclopent-2-ene-1,2-dicarboxylic acid as a N-acyl-l-hydroxyproline bioisostere
摘要:
Potent tetrapeptidic inhibitors of the HCV NS3 protease have been developed incorporating 4-hydroxy-cyclopent-2-ene-1,2-dicarboxylic acid as a new N-acyl-L-hydroxyproline mimic. The hydroxycyclopentene template was synthesized in eight steps from commercially available, (syn)-tetrahydrophthalic anhydride. Three different amino acids were explored in the PI-position and in the P2-position the hydroxyl group of the cyclopentene template was substituted with 7-methoxy-2-phenyl-quinolin-4-ol. The P3/P4-positions were then optimized from a set of six amino acid derivatives. All inhibitors were evaluated in an in vitro assay using the full-length NS3 protease. Several potent inhibitors were identified, the most promising exhibiting a K-i value of 1.1 nM. (c) 2006 Elsevier Ltd. All rights reserved.
The present invention provides novel conformationally-defined macrocyclic compounds that have been demonstrated to be selective modulators of the ghrelin receptor (growth hormone secretagogue receptor, GHS-R1a and subtypes, isoforms and variants thereof). Methods of synthesizing the novel compounds are also described herein. These compounds are useful as agonists of the ghrelin receptor and as medicaments for treatment and prevention of a range of medical conditions including, but not limited to, metabolic and/or endocrine disorders, gastrointestinal disorders, cardiovascular disorders, obesity and obesity-associated disorders, central nervous system disorders, genetic disorders, hyperproliferative disorders and inflammatory disorders.
NOVEL SUBSTITUTED OCTAHYDROCYCLOPENTA[C]PYRROL-4-AMINES AS CALCIUM CHANNEL BLOCKERS
申请人:Stewart Andrew O.
公开号:US20100130558A1
公开(公告)日:2010-05-27
The present application relates to calcium channel inhibitors containing compounds of formula (I)
wherein L
1
, L
2
, R
1
, R
2
, and R
3
are as defined in the specification. The present application also relates to compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions.
Disclosed are compounds of Formula (Ia), and pharmaceutically acceptable salts thereof,
wherein X, Y, R
1
, R
2
, R
3A
, R
3B
, and R
4
are as described herein. The compounds may be used as agents in the treatment of diseases, including cancer. Also disclosed are pharmaceutical compositions comprising one or more compounds of Formula (Ia).
Iron-Catalyzed Anti-Markovnikov Hydroamination and Hydroamidation of Allylic Alcohols
作者:Wei Ma、Xiaohui Zhang、Juan Fan、Yuxuan Liu、Weijun Tang、Dong Xue、Chaoqun Li、Jianliang Xiao、Chao Wang
DOI:10.1021/jacs.9b05221
日期:2019.8.28
nonpolar solvent, features exclusive anti-Markovnikov selectivity, broad substrate scope (>70 examples), and good functional group tolerance. The reaction could be performed at gram scale and applied to the synthesis of drug molecules and heterocyclic compounds. When chiral substrates are used, the stereochemistry and enantiomeric excess are retained. Further application of the chemistry is seen in the
Overcoming the Deallylation Problem: Palladium(II)-Catalyzed Chemo-, Regio-, and Stereoselective Allylic Oxidation of Aryl Allyl Ether, Amine, and Amino Acids
作者:Kartic Manna、Hasina Mamataj Begam、Krishanu Samanta、Ranjan Jana
DOI:10.1021/acs.orglett.0c02465
日期:2020.10.2
We report herein a Pd(II)/bis-sulfoxide-catalyzed intramolecular allylic C–H acetoxylation of aryl allyl ether, amine, and amino acids with the retention of a labile allyl moiety. Mechanistically, the reaction proceeds through a distinct double-bond isomerization from the allylic to the vinylic position followed by intramolecular carboxypalladation and the β-hydride elimination pathway. For the first