Reaction of Non-Racemic (1-Phenyl)ethylamines with Chloromethyl­isothiocyanatothiophosphonates: Synthesis of Optically Active 1,3,4-Thiazaphospholes

Both enantiomers of the major diastereomer of 2-(1-­phenyl)ethylamino-4-thioxo-4-phenoxy-1,3,4-thiazaphosphol-2-ine were obtained in optically pure form by the reaction of O-­phenyl(chloromethyl)isothiophosphonate with (R)-(+)- and (S)-(-)-(1-phenyl)ethylamine.