The organocatalyzed regioselective allylic trifluoromethylation of Morita–Baylis–Hillman adducts using Ruppert–Prakash reagent was achieved in high to excellent yields via a successive SN2′/SN2′ mode for the first time. The reaction was extended to the asymmetric allylic trifluoromethylation by the use of a bis-cinchona alkaloid catalyst with high enantioselectivities up to 94% ee.
首次通过连续的S N 2'/ S N 2'模式,使用Ruppert-Prakash试剂对Morita-Baylis-Hillman加合物进行了有机催化的区域选择性烯丙基三氟甲基化反应,收率很高。通过使用具有高达94%ee的高对映选择性的双金鸡纳生物碱催化剂,反应扩展到不对称的烯丙基三氟甲基化反应。
A Facile Synthesis of Substituted Indenones and Piperidine-2,6-diones from the Baylis-Hillman Acetates
作者:Deevi Basavaiah、Dandamudi V. Lenin
DOI:10.1002/ejoc.201000739
日期:2010.10
Baylis-Hillmanacetates were conveniently transformed into substitutedindenone and piperidine-2,6-dione frameworks by treatment with (di)phenylacetonitrile followed by Friedel-Crafts cyclization or imide formation.