Enantioselective Hydrosilylation of β,β‐Disubstituted Enamides to Construct α‐Aminosilanes with Vicinal Stereocenters
作者:Wen‐Wen Zhang、Bi‐Jie Li
DOI:10.1002/anie.202214534
日期:2023.1.2
A rhodiumcomplex bearing a chiral phosphite ligand catalyzes the hydrosilylation of β,β-disubstituted enamides to afford valuable α-aminosilanes in a highly regio-, diastereo-, and enantioselective manner. Stereodivergent synthesis is achieved by regulating substrate geometry and ligand enantiomer to generate all the possible stereoisomers in high enantio-purity.
Migratory Hydrogenation of Terminal Alkynes by Base/Cobalt Relay Catalysis
作者:Xufang Liu、Bingxue Liu、Qiang Liu
DOI:10.1002/anie.201916014
日期:2020.4.20
an analogous protocol for alkyne substrates is yet to be developed. Herein, a base and cobalt relay catalytic process for the selective synthesis of (Z)-2-alkenes and conjugated E alkenes by migratory hydrogenation of terminalalkynes is disclosed. Mechanistic studies support a relay catalytic process involving a sequential base-catalyzed isomerization of terminalalkynes and cobalt-catalyzed hydrogenation