Catalyst-free Tandem 1,3-Dipolar Cycloaddition/Aldol Condensation: Diastereoselective Construction of the Azatetraquinane Skeleton
作者:Nikolay S. Zimnitskiy、Andrey D. Denikaev、Alexey Y. Barkov、Igor B. Kutyashev、Vladislav Y. Korotaev、Vyacheslav Y. Sosnovskikh
DOI:10.1021/acs.joc.0c01127
日期:2020.7.2
The one-pot regioselective and diastereoselective method for the synthesis of 5-(het)aroyl-7-(het)arylhexahydrobenzo[4,5]pentaleno[1,6a-b](thia)pyrrolizine-6,12-diones from accessible 1,5-di(het)arylpent-4-ene-1,3-diones or curcuminoids in 38–98% yield was developed. This reaction proceeds as a sequence of 1,3-dipolar cycloaddition of azomethine ylide generated in situ from ninhydrin and (thia)proline
一锅区域选择性和非对映选择性的方法,从中合成5- (杂)芳酰基-7-(杂)芳基六氢苯并[4,5]戊烯[1,6 a - b ](硫代)吡咯烷嗪-6,12-二酮可开发的1,5-二(杂)芳基戊-4-烯-1,3-二酮或姜黄素的产率为38-98%。该反应按顺序进行,由茚三酮和(硫代)脯氨酸在相应的二烯二酮的C═C键上原位生成的偶氮甲嘧啶1,3-偶极环加成,随后自发的分子内羟醛缩合,导致氮杂四喹烷的形成。脚手架。