Enantioselective Michael addition of 3-aryloxindoles to a vinyl bisphosphonate ester catalyzed by a cinchona alkaloid derived thiourea catalyst
作者:Mei-Xin Zhao、Tong-Lei Dai、Ran Liu、Deng-Ke Wei、Hao Zhou、Fei-Hu Ji、Min Shi
DOI:10.1039/c2ob25966d
日期:——
A highly enantioselective Michael addition of 3-aryloxindole to vinyl bisphosphonate ester catalyzed by a cinchonidine derived thiourea catalyst has been investigated. The corresponding adducts, containing a chiral quaternary carbon center and geminal bisphosphonate ester fragment at the 3-position of the oxindole, were obtained in moderate to good yields (65–92%) and moderate to good enantioselectivities
已经研究了由辛可尼定衍生的硫脲催化剂催化的3-芳基吲哚向苯二膦酸乙烯基酯的高对映选择性的迈克尔加成反应。相应的加合物以中等至良好的收率(65-92%)和中等至良好的对映选择性(高达92%ee)获得,在羟吲哚的3位上具有手性季碳中心和双膦酸酯双膦酸酯片段。