Stereoselective access to substituted enediyne building blocks
摘要:
Intermolecular coupling-elimination of disubstituted propargyl bromides gives rise to differentially substituted 3-hexen-1,5-diynes with E:Z selectivity as high as 100:1. Application of the methodology in the synthesis of key nanomaterial building blocks is demonstrated. (C) 1999 Elsevier Science Ltd. All rights reserved.
Catalytic Enantioconvergent Allenylation of Aldehydes with Propargyl Halides
作者:Feng‐Hua Zhang、Xiaochong Guo、Xianrong Zeng、Zhaobin Wang
DOI:10.1002/anie.202117114
日期:2022.3
A Cr-catalyzed enantioconvergent allenylation reaction of aldehydes with racemic propargyl halides has been developed. This robust method employs simple and readily accessible materials, exhibits exceptional functional group tolerance and broad substrate scope, and provides facile access to a wide range of valuable optically enriched α-allenols with two or three continuous chiral centers, including