Use of achiral additives to increase the stereoselectivity in Rh(ii)-catalyzed cyclopropanations
作者:David Marcoux、Vincent N. G. Lindsay、André B. Charette
DOI:10.1039/b920587j
日期:——
We describe our studies on the effect of various Lewis bases and Brønsted acids as achiral additives on the stereoselectivity of some Rh(II)-catalyzed cyclopropanations.
<i>trans</i>-Directing Ability of Amide Groups in Cyclopropanation: Application to the Asymmetric Cyclopropanation of Alkenes with Diazo Reagents Bearing Two Carboxy Groups