Bi(OTf)<sub>3</sub>-Catalyzed Alkyl-Intercepted Meyer–Schuster Rearrangement of Propargylic Alcohols for the Synthesis of 1,2,3,5-Tetrasubstituted Pentane-1,5-diones
作者:Zhihai Wang、Yuxing Sun、Qinglin Zhang、Wanyong Pan、Tiantian Li、Yan Yin
DOI:10.1021/acs.joc.1c02974
日期:2022.3.4
An alkyl intercepted Meyer–Schuster rearrangement reaction with α,β-unsaturated ketones as the electrophiles was first investigated, which provided a facile method to construct 2-methylene-pentane-1,5-diones. Then the in situ generated 2-methylene-pentane-1,5-diones underwent a Michael addition to give diverse 2-malononitrile methyl substituted pentane-1,5-diones in a one-pot fashion. This transformation
首次研究了以α,β-不饱和酮为亲电试剂的烷基拦截Meyer-Schuster重排反应,为构建2-亚甲基戊烷-1,5-二酮提供了一种简便的方法。然后原位生成的 2-亚甲基-戊烷-1,5-二酮经历迈克尔加成,以一锅方式产生多种 2-丙二腈甲基取代的 1,5-二酮。这种转化在克级上是可靠的。高产率、方便的实验操作和100%的原子经济性使其成为构建1,2,3,5-四取代戊烷-1,5-二酮衍生物的有价值的方法。