Asymmetric reduction of sulphoxides with optically active phosphorus thioacids. Absolute configuration of O-ethyl ethylphosphonothioic acid
Abstract
Partial reduction of racemic methyl alkyl sulphoxides with optically active phosphonothioic acids gives recovered sulphoxides that are optically active; the (R)-configuration is assigned to (–)-O-ethyl ethylphosphonothioic acid.