Influence of the Aromatic Substituent on the Reactivity of (R)-N-Methyl-1-phenyl-2-(1-piperidinyl)ethanamine Cuprates in Enantioselective Conjugate Addition
Influence of the Aromatic Substituent on the Reactivity of (R)-N-Methyl-1-phenyl-2-(1-piperidinyl)ethanamine Cuprates in Enantioselective Conjugate Addition
A practical method for the asymmetric transferhydrogenation of α‐substituted ketones was developed utilizing oxo‐tethered N‐sulfonyldiamine‐ruthenium complexes. Reduction by HCO2H and HCO2K in a mixed solvent of EtOAc/H2O allowed for the selective synthesis of halohydrins from 2‐bromoacetophenone (98%) and 2‐chloroacetophenone (>99%), leading to suppressed undesired side reactions stemming from formylation
Catalytic Enantioselective Conversion of Epoxides to Thiiranes
作者:Saihu Liao、Markus Leutzsch、Mattia Riccardo Monaco、Benjamin List
DOI:10.1021/jacs.6b01960
日期:2016.4.27
A highlyefficient and enantioselective Brønsted acid catalyzed conversion of epoxides to thiiranes has been developed. The reaction proceeds in a kineticresolution, furnishing both epoxide and thiirane in highyields and enantiomeric purity. Heterodimer formation between the catalyst and sulfur donor affords an effective way to prevent catalyst decomposition and enables catalyst loadings as low as
Influence of the Aromatic Substituent on the Reactivity of (R)-N-Methyl-1-phenyl-2-(1-piperidinyl)ethanamine Cuprates in Enantioselective Conjugate Addition