N-Sulfinyl imines are versatile intermediates in the asymmetric synthesis of chiral amines such as α-branched amines,α,β-dibranched amines,α-andβ-amino acids,aziridines,andα-andβ-aminophosphonic acids.While N-p-toluenesulfinyl imines have been the major focus of these synthetic studies,due to substantial differences in their steric and electronic properties,the reactivities between them are different.So here we described the synthesis of a novel enantiomerically pure mesitylenesulfinamide.