A process and diastereomeric salts useful for the optical resolution of racemic &agr;-[4-(1,1-dimethylethyl)phenyl]-4-(hydroxydiphenylmethyl)-1-piperidinebutanol, 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-&agr;,&agr;-dimethylbenzeneacetic acid and lower alkyl 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-&agr;,&agr;-dimethylbenzeneacetates. The process comprises placing into solution a chiral resolving agent, either (+)/(−)-di-paratoluoyltartaric acid or (−)/(+)-mandelic acid, in an amount equimolar to a compound corresponding to the desired enantiomer of the above compound, precipitating the resulting diastereomeric salt between the chiral resolving agent and the target enantiomer and separating the enantiomer.
一种过程和对映异构盐,用于光学分离外消旋的α-[4-(
1,1-二甲基乙基)苯基]-4-(羟基二苯甲基)-1-
哌啶丁醇,4-[4-[4-(羟基二苯甲基)-1-
哌啶基]-
1-羟基丁基]-α,α-二甲基
苯乙酸和较低的烷基4-[4-[4-(羟基二苯甲基)-1-
哌啶基]-
1-羟基丁基]-α,α-二甲基
苯乙酸酯的光学分辨。该过程包括将手性分离剂(+)/(-)-对
甲苯酰
酒石酸或(-)/(+)-
苯乙酸曼德酯,以与所需对映体的化合物相当的摩尔量置于溶液中,使手性分离剂和目标对映体之间形成沉淀的对映异构盐,并分离对映体。