Expeditious diastereoselective construction of a thiochroman skeleton via a cinchona alkaloid-derived catalyst
作者:Zhiyun Du、Chenggang Zhou、Yaojun Gao、Qiao Ren、Kun Zhang、Hansong Cheng、Wei Wang、Jian Wang
DOI:10.1039/c1ob06497e
日期:——
diastereoselective and enantioselectivesynthesis of thiochroman derivatives through a sulfa-Michael–Michael cascadesequence is disclosed. This is a significant complement of the quinine-thiourea catalyzed sulfa-Michael–Michael cascade reaction. The denselyfunctionalized target thiochromans were obtained in high diastereoselectivities, and with high to excellent enantioselectivities.