Gold‐Catalyzed Stereoselective Domino Cyclization/Alkynylation of
<i>N</i>
‐Propargylcarboxamides with Benziodoxole Reagents for the Synthesis of Alkynyloxazolines
作者:Ximei Zhao、Bing Tian、Yangyang Yang、Xiaojia Si、Florian F. Mulks、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201900264
日期:2019.7.2
highly stereoselective synthesis of alkynyloxazolines via a gold‐catalyzed domino cyclization‐alkynylation cascade of N‐propargylcarboxamides with benziodoxole reagents is reported. This new protocol, which represents an attractive alternative to two step sequences based on Sonagashira couplings, offers a broad substrate scope, excellent functional group tolerance, and perfect stereoselectivity. A comparison
据报道,通过金催化的N-炔丙基甲酰胺与苯并吲哚酚试剂的多米诺环化-炔基级联反应,可以对炔基恶唑啉进行简明且高度立体选择性的合成。该新协议代表了基于Sonagashira偶联的两个步骤的引人注目的替代方案,可提供广泛的底物范围,出色的官能团耐受性和完美的立体选择性。产物异构体的计算能量的比较表明动力学控制是观察到的选择性的原因。