Development of a highly selective EP2-receptor agonist. Part 1: identification of 16-hydroxy-17,17-trimethylene PGE2 derivatives
摘要:
Design and synthesis of an EP2-receptor selective agonist began with the chemical modification of alpha- and omega-chains of butaprost 1a, which exhibits an affinity for the IP-receptor. Two series of prostaglandin (PG) analogues with a 16-hydroxy-17,17-trimethylene moiety as an omega-chain were identified. Among those tested, 4a,b,e,f,h and 6a,b,e,f,h were found to be highly selective EP2-receptor agonists. Structure activity relationships are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.
Enantioselective “clip-cycle” synthesis of di-, tri- and spiro-substituted tetrahydropyrans
作者:Khadra Alomari、N. Sai Pavan Chakravarthy、Bastien Duchadeau、Kristaps Ermanis、Paul A. Clarke
DOI:10.1039/d2ob00023g
日期:——
ω-Unsaturated alcohols were “clipped” via alkene metathesis to a thioester activating group, which was followed by a chiral phosphoric acid catalyzed intramolecular oxa-Michael cyclization to yield tetrahydropyrans and spiro-tetrahydropyrans with excellent enantioselectivity. The mechanism and origin of the enantioselectivity was probed by DFT calculations and kinetic isotope studies, where there was
Oxa-spirocycles: synthesis, properties and applications
作者:Kateryna Fominova、Taras Diachuk、Dmitry Granat、Taras Savchuk、Vladyslav Vilchynskyi、Oleksiy Svitlychnyi、Vladyslav Meliantsev、Igor Kovalchuk、Eduard Litskan、Vadym V. Levterov、Valentyn R. Badlo、Ruslan I. Vaskevych、Alla I. Vaskevych、Andrii V. Bolbut、Volodymyr V. Semeno、Rustam Iminov、Kostiantyn Shvydenko、Anastasiia S. Kuznetsova、Yurii V. Dmytriv、Daniil Vysochyn、Vasyl Ripenko、Andrei A. Tolmachev、Olexandra Pavlova、Halyna Kuznietsova、Iryna Pishel、Petro Borysko、Pavel K. Mykhailiuk
DOI:10.1039/d1sc03615g
日期:——
A general practical approach to a new generation of spirocyclic molecules – oxa-spirocycles – is developed.
开发了一种新一代螺环分子 - 氧杂螺环 - 的一般实用方法。
Discovery of Vaniprevir (MK-7009), a Macrocyclic Hepatitis C Virus NS3/4a Protease Inhibitor
作者:John A. McCauley、Charles J. McIntyre、Michael T. Rudd、Kevin T. Nguyen、Joseph J. Romano、John W. Butcher、Kevin F. Gilbert、Kimberly J. Bush、M. Katharine Holloway、John Swestock、Bang-Lin Wan、Steven S. Carroll、Jillian M. DiMuzio、Donald J. Graham、Steven W. Ludmerer、Shi-Shan Mao、Mark W. Stahlhut、Christine M. Fandozzi、Nicole Trainor、David B. Olsen、Joseph P. Vacca、Nigel J. Liverton
DOI:10.1021/jm9015526
日期:2010.3.25
A new class of H CV NS3/4a protease inhibitors which contain a P2 to P4 macrocyclic constraint was designed using a molecular-modeling derived strategy. Exploration of the P2 heterocyclic region, the P2 to P4 linker, and the PI side chain of this class of compounds via a modular synthetic strategy allowed for the optimization of enzyme potency, cellular activity, and rat liver exposure following oral closing. These studies led to the identification of clinical candidate 35b (vaniprevir, MK-7009), which is active against both the genotype 1 and genotype 2 NS3/4a protease enzymes and has good plasma exposure and excellent liver exposure in multiple species.
Development of a highly selective EP2-receptor agonist. Part 1: identification of 16-hydroxy-17,17-trimethylene PGE2 derivatives
Design and synthesis of an EP2-receptor selective agonist began with the chemical modification of alpha- and omega-chains of butaprost 1a, which exhibits an affinity for the IP-receptor. Two series of prostaglandin (PG) analogues with a 16-hydroxy-17,17-trimethylene moiety as an omega-chain were identified. Among those tested, 4a,b,e,f,h and 6a,b,e,f,h were found to be highly selective EP2-receptor agonists. Structure activity relationships are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.
Tuning the Reactivity of Alkoxyl Radicals from Cyclization to 1,2-Silyl Transfer: Stereoselective Synthesis of β-Substituted Cycloalcohols
作者:Xingyi He、Yunlong Zhao、Zeguo Zhang、Xiao Shen
DOI:10.1021/acs.orglett.2c00428
日期:2022.3.18
Herein, we report a radical strategy for diastereoselective construction of β-substituted cyclopentanols and cyclobutanols. The success of the reaction is attributed to the favorable radical 1,2-silyl transfer over the cyclization of alkoxy radicals to the olefins. The reaction shows broad substrate scope and wide functional-group tolerance. The synthetic potential of the methodology was demonstrated