π-Coordinating Chiral Primary Amine/Palladium Synergistic Catalysis for Asymmetric Allylic Alkylation
作者:Yaning Wang、Junli Chai、Chang You、Jie Zhang、Xueling Mi、Long Zhang、Sanzhong Luo
DOI:10.1021/jacs.9b13026
日期:2020.2.12
synergistic catalysis for asymmetric allylic alkylation of α-branched β-ketocarbonyls. The use of arene-containing chiral primary amine catalyst led to not only enhanced reaction rate but also reversed chiral induction comparing with its sterically bulky derivative. Both enantiomers of the allylic adducts bearing acyclic all-carbon quaternary stereocenters could be obtained from the same configured chiral aminocatalyst
我们报告了一种含芳烃的手性伯胺作为双氨基催化剂和配体。用于α-支化β-酮羰基不对称烯丙基烷基化的π-配位氨基催化剂/钯协同催化。与空间庞大的衍生物相比,含芳烃的手性伯胺催化剂的使用不仅提高了反应速率,而且还逆转了手性诱导。带有无环全碳四元立体中心的烯丙基加合物的两种对映异构体都可以从相同配置的手性氨基催化剂中以高效和优异的区域选择性、立体选择性和对映选择性获得。机理研究揭示了一种独特的 Pd-芳烃 π 配位模式,用于有效催化。