Organocatalyzed Formal [2 + 2] Cycloaddition of Ketimines with Allenoates: Facile Access to Azetidines with a Chiral Tetrasubstituted Carbon Stereogenic Center
作者:Shinobu Takizawa、Fernando Arteaga Arteaga、Yasushi Yoshida、Michitaka Suzuki、Hiroaki Sasai
DOI:10.1021/ol401817q
日期:2013.8.16
An enantioselective organocatalyzed aza-MBH-type reaction of ketimines and allenoates has been developed. The present formal [2 + 2] cycloaddition produces highly functionalized azetidines with a chiral tetrasubstituted carbon stereogenic center in good to excellent yields and high enantioselectivities.