Organocatalytic Enantioselective Cycloetherifications Using a Cooperative Cation-Binding Catalyst
作者:Amol P. Jadhav、Jeong-A Oh、In-Soo Hwang、Hailong Yan、Choong Eui Song
DOI:10.1021/acs.orglett.8b02240
日期:2018.9.7
A highly enantioselective cycloetherification strategy for the straightforward synthesis of enantioenriched tetrahydrofurans, tetrahydropyrans, and oxepanes using Song’s cation-binding oligoEG catalyst and KF as the base is demonstrated. A wide range of ε-, ζ-, and η-hydroxy-α,β-unsaturated ketones were cyclized to the corresponding five-, six-, and seven-membered chiral oxacycles with high enantiopurity