Rhodium-Catalyzed Synthesis of γ-Pyrones by Three Consecutive Redox-Aldol Reactions of Allylic Alcohols with α,β-Unsaturated Aldehydes
作者:Akio Mizuno、Hiroyuki Kusama、Nobuharu Iwasawa
DOI:10.1002/chem.201001068
日期:——
All together now! A unique RhI‐catalyzed reaction was developed to produce γ‐pyrones, which are 1,3,5‐triketone equivalents. This reaction was thought to proceed by three redox reactions of allylic alcohols, two intermolecular aldol reactions of α,β‐unsaturated aldehydes, and one intramolecular aldol reaction to afford 1,3‐cyclohexanediones, which were then converted into γ‐pyrones (see scheme; TMSOTf=trimethylsilyl
现在都在一起了!开发了独特的Rh I催化反应以生成γ-吡喃酮,其为1,3,5-三酮当量。该反应被认为是通过烯丙醇的三个氧化还原反应,两个α,β-不饱和醛的分子间羟醛反应和一个分子内的羟醛反应进行的,以提供1,3-环己二酮,然后将其转化为γ-吡喃酮(见方案) ; TMSOTf =三甲基甲硅烷基三氟甲磺酸盐)。