Highly Stereoselective Synthesis of 2,6-<i>cis</i>-Substituted Tetrahydropyrans Using a One-Pot Sequential Catalysis
作者:Qipu Dai、Nirmal K. Rana、John Cong-Gui Zhao
DOI:10.1021/ol400900h
日期:2013.6.21
A catalytic highly diastereo- and enantioselective synthesis of 2,6-cis-substituted tetrahydropyrans was realized using a one-pot sequential catalysis involving Henry and oxa-Michael reactions. The nitroaldol products obtained in a highly enantioselective copper(II)-catalyzed Henry reaction between nitromethane and 7-oxo-hept-5-enals were subsequently treated with a catalytic amount of camphorsulfonic