Diastereoselective Direct Catalytic Asymmetric Mannich-Type Reactions of Alkylnitriles with a Ni(II)-Carbene Complex
作者:Shinya Adachi、Akira Saito、Masakatsu Shibasaki
DOI:10.1021/acs.orglett.2c01624
日期:2022.6.3
Despite recent advances in reactions using alkylnitriles as carbon nucleophiles, diastereoselective directcatalyticasymmetricreactions, in which two consecutive chiral centers could be controlled, remain largely unexplored. Herein, we report the addition of alkylnitriles (such as propionitrile) to imines in the presence of a catalytic amount of a chiral pincer-type Ni-carbene complex and potassium
AbstractAn α‐N3 7‐azaindoline amide serves as a latent enolate to directly engage in an asymmetric Mannich‐type reaction with N‐thiophosphinoyl imines by the action of a cooperative catalyst. The thus‐obtained highly enantioenriched anti‐adduct was transformed into β‐amino‐α‐azido acid in high yield by simple acidic treatment.