Highly Enantioselective Michael Addition of Malonate Derivatives to Enones Catalyzed by an<i>N</i>,<i>N</i>′-Dioxide-Scandium(III) Complex
作者:Donghui Chen、Zhenling Chen、Xiao Xiao、Zhigang Yang、Lili Lin、Xiaohua Liu、Xiaoming Feng
DOI:10.1002/chem.200901157
日期:2009.7.13
A highly enantioselective Michael addition of malonate derivatives to chalcone derivatives catalyzed by an N,N′‐dioxide–ScIII complex was developed, which tolerated a broad range of substrates in moderate to excellent yield with 96–99 % ee. The reaction proceeded well in EtOH or water and could be scaled to grams in good yield with 98 % ee using only 1 mol % ligand L–scandium(III) complex as a catalyst
N,N'-二氧化物-Sc III络合物催化的丙二酸酯衍生物向查尔酮衍生物的高度对映选择性迈克尔加成反应得以开发,该方法可耐受多种底物,中度至优异产率(ee为96-99%)。该反应在EtOH或水中进行得很好,并且仅使用1 mol%的配体L -((III)配合物作为催化剂,即可以98%ee的高收率将其规模定为克(见方案)。