Catalytic enantioselective reactions .8. Catalytic enantioselective addition of diethylzinc to aldehydes using (2S,3S)-(-)-1,4-diamino-2,3-butanediol derivatives as chiral catalysts

A series of new chiral beta-N,N-dialkylaminoalcohol derivatives with an axis of C-2 symmetry was prepared from diethyl L-tartrate and their enantioselectivities as chiral catalysts for enantioselective addition of diethylzinc to aldehydes were compared.