The resolution of (+/-)-threo-methylphenidate by enzymatic hydrolysis
with alpha-chymotrypsin or subtilisin carlsberg to afford (2S,2'S)-(-)
-threo and (2R,2'R)-(+)-threo-methylphenidate hydrochlorides in high e
nantiomeric purities is described. (C) 1998 Elsevier Science Ltd. All
rights reserved.