Catalytic Asymmetric Claisen Rearrangement of Enolphosphonates: Construction of Vicinal Tertiary and All-Carbon Quaternary Centers
作者:Jiajing Tan、Cheol-Hong Cheon、Hisashi Yamamoto
DOI:10.1002/anie.201203092
日期:2012.8.13
A copper‐catalyzed enantioselective Claisenrearrangement of easily accessible enolphosphonates using the commercially available PhBOX as the chiral ligand was developed. A wide range of rearrangement products with contiguous tertiary and all‐carbon quaternarycenters were obtained in excellent yields and stereoselectivities. The α‐ketophosphonate substituent in the products could be easily transformed