Enantioselective Merger of Aminocatalysis with π-Lewis Acid Metal Catalysis: Asymmetric Preparation of Carbo- and Heterocycles
作者:Chandrasekaran Praveen、Benjamin Montaignac、Maxime R. Vitale、Virginie Ratovelomanana-Vidal、Véronique Michelet
DOI:10.1002/cctc.201300313
日期:2013.8
ratio. After a careful examination of several other strategies, the best synergic catalytic system, which combines a chiral copper(I) complex with cyclohexylamine, afforded the enantioselective preparations of cyclopentane, indane, and pyrrolidine scaffolds with moderate to excellent control of the all‐carbon quaternary stereogenic centers created through such cyclization processes.
通过氨基催化与α-二取代甲酰基炔烃的催化铟(III)或铜(I)活化的合并,描述了各种五元碳环和杂环结构的金属有机催化对映选择性合成。与(R)-1,1'-双-(2-萘胺)配体结合使用三氯化铟可产生令人鼓舞的结果,对映体比例高达85:15。在仔细研究了其他几种策略后,将手性铜(I)配合物与环己胺结合在一起的最佳协同催化系统,提供了对环戊烷,茚满和吡咯烷骨架的对映选择性制备,对中碳四元化合物的控制程度中等至优异通过这种环化过程建立的立体成因中心。