K. Miyashita et al., EFFECT OF THE NEIGHBORING OXYGENATED SUBSTITUENT ON ASYMMETRIC REDUCTION WITH HANTZSCH-TYPE 1,4-DIHYDROPYRIDINES HAVING A CHIRAL SULFINYL GROUP, Chemical communications, (22), 1996, pp. 2535-2536
Introduction of the oxygen substituent at C-6 of the Hantzsch-type com
pound having a sulfinyl group at C-5 affects the reduction of ketones
with respect to both reactivity and stereoselectivity.