Primary-Secondary Diamine Catalyzed Enantioselective Synthesis of Substituted Cyclohex-2-enones by Cascade Michael–Aldol–Dehydration of Ketones with Chalcones
作者:Sandip Wagh、Ganesh Dhage
DOI:10.1055/s-0036-1588976
日期:2017.7
A simple primary-secondary diamine organocatalyst catalyzes the cascade Michael–aldol–dehydration of chalcones and unmodified ketones to produce substituted cyclohex-2-enones under mild conditions with good yields and high enantio- and/or diastereoselectivities. The success of the catalyst system is possibly due to simultaneous activation of the electrophilic chalcone by iminium formation and the nucleophilic
一种简单的伯仲二胺有机催化剂催化查耳酮和未改性酮的级联迈克尔-羟醛脱水,在温和条件下以良好的收率和高对映选择性和/或非对映选择性生产取代的环己-2-烯酮。催化剂体系的成功可能是由于通过亚胺形成同时激活亲电子查耳酮和通过烯胺形成同时活化亲核酮,具有整体分子内亚胺-二烯胺机制。