Organocatalytic Asymmetric Sulfa-Michael Addition of Thiols to α,β-Unsaturated Hexafluoroisopropyl Esters: Expeditious Access to (R)-Thiazesim
摘要:
A highly efficient organocatalytic asymmetric SMA reaction of hexafluoroisopropyl alpha,beta-unsaturated esters has been developed. Introducing electron-withdrawing hexafluoroisopropyl ester is crucial to enhancing the electrophilicity of unsaturated esters as SMA acceptors. The catalytic system performs well over a broad scope of alpha,beta-unsaturated esters and diversified thiols and provides facile access to (R)-thiazesim in a one-pot protocol.
Organocatalytic Asymmetric Sulfa-Michael Addition of Thiols to α,β-Unsaturated Hexafluoroisopropyl Esters: Expeditious Access to (R)-Thiazesim
摘要:
A highly efficient organocatalytic asymmetric SMA reaction of hexafluoroisopropyl alpha,beta-unsaturated esters has been developed. Introducing electron-withdrawing hexafluoroisopropyl ester is crucial to enhancing the electrophilicity of unsaturated esters as SMA acceptors. The catalytic system performs well over a broad scope of alpha,beta-unsaturated esters and diversified thiols and provides facile access to (R)-thiazesim in a one-pot protocol.