Preparation of Cyclic <i>N</i>-<i>tert</i>-Butylsulfonyl Enamines by Rh(II)-Mediated Ring Expansion of α-Diazoesters
作者:Jianbo Wang、Shufeng Chen、Yonghua Zhao
DOI:10.1055/s-2006-926449
日期:2006.5
The anion derived from ethyl diazoacetate adds to N-tert-butylsulfonyl ketimines to give β-tert-butylsulfonylamino α-diazoesters, which are further transformed into cyclic enamines by treatment with Rh2(OAc)4, through 1,2-C-C bond migration of a Rh(II) carbene intermediate.
乙二氮乙酸乙酯衍生的阴离子与N-叔丁基磺酰亚胺加成,生成β-叔丁基磺酰氨基α-重氮酯,经Rh2(OAc)4处理后,通过Rh(II)卡宾中间体的1,2-C-C键迁移反应,进一步转化为环状烯胺。