31P n.m.r. nonequivalence of diastereoisomeric O,O-dialkyl phosphorodithioates
Abstract
The enantiomeric excess of chiral alcohols can be obtained from the ratio of integrations of 31P n.m.r. absorptions of diastereoisomeric O,O-dialkyl dithioates (3, X = S) derived therefrom; 31P n.m.r. nonequivalence of L-cinchonidine salts of (3) was also observed.