Contact Ion Pair Directed Lewis Acid Catalysis: Asymmetric Synthesis of<i>trans</i>‐Configured β‐Lactones
作者:Thomas Kull、René Peters
DOI:10.1002/anie.200801143
日期:2008.7.7
Catalytic Asymmetric Synthesis of trans-Configured β-Lactones: Cooperation of Lewis Acid and Ion Pair Catalysis
作者:Thomas Kull、José Cabrera、René Peters
DOI:10.1002/chem.201000840
日期:——
development of the first trans‐selective catalytic asymmetric [2+2] cyclocondensation of acyl halides with aliphatic aldehydes furnishing 3,4‐disubstituted β‐lactones is described. This work made use of a new strategy within the context of asymmetric dual activation catalysis: it combines the concepts of Lewisacid and organic aprotic ionpaircatalysis in a single catalyst system. The methodology could