Asymmetric Induction Reactions. VI. Asymmetric Synthesis of a Cyclopentene Derivative by Transition Metal-Catalyzed Asymmetric Vinylcyclopropane-Cyclopentene Rearrangements with Chiral Phosphine Ligands.
A Highly Efficient and Broadly Applicable Cationic Gold Catalyst
作者:Deepika Malhotra、Mark S. Mashuta、Gerald B. Hammond、Bo Xu
DOI:10.1002/anie.201310239
日期:2014.4.22
Goldcatalysts capable of promoting reactions at low‐level loadings under mild conditions are the exception rather than the norm. We examined reactions where the regeneration of cationicgoldcatalyst (e.g., protodeauration) was the turnover limiting stage. By manipulating electron density on the substituents around phosphorus and introducing steric handles we designed a phosphine ligand that contains