Synthesis of the C12−C19 Fragment of (+)-Peloruside A through a Diastereomer-Discriminating RCM Reaction
摘要:
A short and efficient asymmetric synthesis of the C12-C19 fragment of the cytotoxic macrolide (+)-peloruside A has been achieved via a highly diastereomer-discriminating RCM of alpha-branched but-3-enoate ester of a methallylic alcohol derived from hydrolytically resolved (S)-(-)-propylene oxide.
Direct Enantioselective and Regioselective Alkylation of β,γ-Unsaturated Carboxylic Acids with Chiral Lithium Amides as Traceless Auxiliaries
作者:Kai Yu、Bukeyan Miao、Wenqi Wang、Armen Zakarian
DOI:10.1021/acs.orglett.9b00587
日期:2019.3.15
Efficient asymmetric alkylation of β,γ-unsaturated carboxylicacids without prior functionalization is enabled by chiral lithium amides. Enantioselectivity is imparted by a putative mixed lithium amide–enediolate aggregate that acts a traceless auxiliary formed in situ, allowing for a direct asymmetric alkylation and a simple recovery of the chiral reagent.
[EN] HETEROCYCLIC CETP INHIBITORS<br/>[FR] INHIBITEURS DE CETP HETEROCYCLIQUES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2007062308A2
公开(公告)日:2007-05-31
[EN] Compounds of formula (Ia) and (Ib) wherein A, B, C and R1 are described herein. [FR] La présente invention concerne des composés de formules (Ia) et (Ib) dans lesquelles A, B, C et R1 ont les correspondances indiquées dans l'invention.