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 enantioselective synthesis of thiochroman derivatives through a sulfa-Michael–Michael cascade sequence is disclosed. This is a significant complement of the quinine-thiourea catalyzed sulfa-Michael–Michael cascade reaction. The densely functionalized target thiochromans were obtained in high diastereoselectivities, and with high to excellent enantioselectivities.
公开了通过磺胺-迈克尔-迈克尔级联序列的硫代苯并二氢吡喃衍生物的非对映选择性和对映选择性的实例。这是奎宁-硫脲催化的磺胺-迈克尔-迈克尔级联反应的重要补充。以高非对映选择性以及高至优异的对映选择性获得了高密度官能化的目标硫代吡喃。