Synthesis and Structure–Activity Relationship Studies of Anti-Inflammatory Epoxyisoprostane Analogues
作者:Helene Wolleb、Seiji Ogawa、Michael Schneider、Andrej Shemet、Jonathan Muri、Manfred Kopf、Erick M. Carreira
DOI:10.1021/acs.orglett.8b01042
日期:2018.5.18
the epoxyisoprostane EC is a highly effective inhibitor of the secretion of the proinflammatory cytokine IL-6. Herein, a modular synthesis of analogues is described, allowing flexible variations of the cyclic side chain of the parent lactone. A structure–activityrelationship study identified a lactam analogue that retains the high activity. Furthermore, the exocyclic allylic alcohol was shown to be crucial
Enantioselective syntheses of (R)-pipecolic acid, (2R,3R)-3-hydroxypipecolic acid, β-(+)-conhydrine and (−)-swainsonine using an aziridine derived common chiral synthon
作者:Subhash P. Chavan、Lalit B. Khairnar、Kailash P. Pawar、Prakash N. Chavan、Sanket A. Kawale
DOI:10.1039/c5ra06429e
日期:——
Concisetotal syntheses of (R)-pipecolic acid, (R)-ethyl-6-oxopipecolate, (2R,3R)-3-hydroxypipecolicacid and formal syntheses of β-(+)-conhydrine, (−)-lentiginosine, (−)-swainsonine and 1,2-di-epi-swainsonine have been accomplished starting from a common chiral synthon. The present strategy employs regioselective aziridine ring opening, Wittig olefination and RCM as the key chemical transformations
简明的(R)-哌酸,(R)-乙基-6-氧代哌酸酯,(2 R,3 R)-3-羟基哌酸的总合成以及β-(+)-羟基,(-)-龙胆苷的形式合成,(-)-swainsonine和1,2- di - epi -swainsonine已从常见的手性合成子开始完成。本策略采用区域选择性氮丙啶开环,维蒂希烯化和RCM作为关键化学转化。