Dynamic kinetic resolution of beta-keto sulfones via asymmetric transfer hydrogenation

The dynamic kinetic resolution of beta-keto sulfones was achieved via asymmetric transfer hydrogenation using ( S,S)-RuCl[N-(tosyl)1,2- diphenylethylenediamine](p-cymene) in the presence of formic acid and triethylamine afforded the desired products in good yield with up to > 99 : 1 dr and high ee up to > 99%.