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.