A Formal [3+2] Annulation of
<i>β</i>
‐Oxoamides and 3‐Alkyl‐ or 3‐Aryl‐Substituted Prop‐2‐Ynyl Sulfonium Salts: Substrate‐Controlled Chemoselective Synthesis of Substituted
<i>γ</i>
‐Lactams and Furans
作者:Bicheng Deng、Chitturi Bhujanga Rao、Rui Zhang、Jiacheng Li、Yongjiu Liang、Yanning Zhao、Ming Gao、Dewen Dong
DOI:10.1002/adsc.201900693
日期:2019.10.8
A substrate‐controlled synthesis of substituted γ‐lactams and furans has been developed via a formal [3+2] annulation of β‐oxoamides and 3‐alkyl/arylprop‐2‐ynyl sulfonium salts in the presence of cesium carbonate in a chemoselective manner. This novel protocol features easily available starting materials, mild reaction conditions, simple execution, and good to excellent yields of products.
取代的甲基片控制的合成γ β-内酰胺类和呋喃已经开发通过正式[3 + 2]环β在碳酸铯的存在下和-oxoamides 3-烷基/ arylprop -2-炔基锍盐在化学选择性的方式。这种新颖的方案具有容易获得的起始原料,温和的反应条件,简单的实施以及良好至极好的产品收率的特点。