Lewis base mediated halogenation/semipinacol rearrangement of diazo compounds: new access to α-halo-quaternary ketones
作者:Haibin Mao、Zhongkai Tang、Hongwen Hu、Yixiang Cheng、Wen-Hua Zheng、Chengjian Zhu
DOI:10.1039/c4cc04154b
日期:——
A novel halogenation/semipinacol rearrangement of alpha-diazo alcohol catalyzed by Lewis base has been developed through a carbene-free mechanism. This semipinacol transposition, initiated by an electrophilic halogenation (X = Cl(+), Br(+), and I(+)) of diazo carbon event, furnished a convenient synthetic route for the efficient synthesis of alpha-halo-quaternary ketones under mild conditions.
通过无卡宾机理,开发了一种新的由路易斯碱催化的α-重氮醇的卤代/西美萘那醇重排。通过重氮碳事件的亲电卤化(X = Cl(+),Br(+)和I(+))引发的半频哪醇转座,为在以下条件下有效合成α-卤代季酮提供了一条便捷的合成途径温和的条件。