Potassium Base‐Catalyzed Michael Additions of Allylic Alcohols to α,β‐Unsaturated Amides: Scope and Mechanistic Insights
作者:Masahiro Sai、Hiroaki Kurouchi
DOI:10.1002/adsc.202100272
日期:——
We report herein the first KHMDS-catalyzed Michael additions of allylic alcohols to α,β-unsaturated amides through allylic isomerization. The reaction proceeds smoothly in the presence of only 5 mol% of KHMDS to afford a variety of 1,5-ketoamides in high yields. Mechanistic investigations, including experimental and computational studies, reveal that the KHMDS-catalyzed in-situ generation of the enolate
我们在此报告了第一次 KHMDS 催化的烯丙醇迈克尔加成反应,通过烯丙基异构化将烯丙醇加成到 α,β-不饱和酰胺。该反应在仅 5 mol% 的 KHMDS 存在下顺利进行,以高产率提供各种 1,5-酮酰胺。包括实验和计算研究在内的机理研究表明,KHMDS 催化通过隧穿辅助的 1,2-氢化物转移从烯丙醇原位生成烯醇化物是这种转化成功的关键。