Organocatalytic asymmetric conjugate addition of α-substituted cyanoacetates to maleimides
作者:Jin-Jia Wang、Xue-Jiao Dong、Wen-Tao Wei、Ming Yan
DOI:10.1016/j.tetasy.2011.04.009
日期:2011.3
The asymmetric conjugateaddition of α-substitutedcyanoacetates to N-substituted maleimides has been developed. A number of cinchona alkaloids and amine thioureas were evaluated as catalysts. Takemoto’s catalyst was found to be the most efficient for the transformation. Chiral succinimides with two adjacent quaternary and tertiary stereogenic carbon centers were obtained in good yields, enantioselectivities