Cinchona-based squaramide-catalysed cascade aza-Michael–Michael addition: enantioselective construction of functionalized spirooxindole tetrahydroquinolines
作者:Wen Yang、Da-Ming Du
DOI:10.1039/c3cc44930k
日期:——
An efficient enantioselective cascade aza-Michael-Michael addition reaction catalysed by a chiral bifunctional tertiary amine-squaramide catalyst has been developed. This cascade reaction proceeded well under mild conditions, furnishing highly functionalized spirooxindole tetrahydroquinolines with three contiguous stereocenters in excellent yields with excellent diastereoselectivities (>25:1 dr) and
已开发出一种有效的对映选择性级联氮杂-迈克尔-迈克尔加成反应,该反应由手性双官能叔胺-方酸酰胺催化剂催化。该级联反应在温和条件下进行得很好,提供了具有三个连续立体中心的高度官能化的螺并吲哚四氢喹啉,并具有优异的收率,出色的非对映选择性(> 25:1 dr)和高对映选择性(高达94%ee)。