Convenient synthesis of chiral non-racemic S-mesityl sulfinimines

Abstract A direct multi-component coupling of (2 S ,4 R ,5 S )- N -tosyl-4-methyl-5-phenyl-1,2,3-oxathiozolidine-2-oxide with mesityl magnesium bromide, LHMDS and a range of aldehydes produces chiral sulfinimines in essentially optically pure form in an operationally simple single pot procedure.