Provided is a method of resolving a racemic mixture of a compound of formula I to obtain a desired enantiomer:
1
wherein Ar is C
6
or C
10
aromatic group that can be substituted with H, C
1
to C
6
alkyl, trifluoromethyl or halo, R
5
is halo or —S—R
1
, wherein R
1
is H or acetyl, and R
2
is H or C
1
to C
6
alkyl, the method comprising: reacting a compound of formula I wherein the compound is an ester whereby R
2
is C
1
to C
6
alkyl with a lipase derived from Mucor meihei to stereoselectively hydrolyze the ester bond to produce an acid; and isolating the acid, wherein the reaction is conducted in a solvent comprising 80% to 98% v/v % organic phase and a residue of water phase (which can be buffered).
提供的是一种分离化合物I的外消旋混合物以获得所需对映体的方法:1其中Ar是C6或C10芳香基团,可以用H,C1到C6烷基,三
氟甲基或卤素取代,R5是卤素或-S-R1,其中R1是H或乙酰基,R2是H或C1到C6烷基,该方法包括:用来自美丽孢霉的
脂肪酶反应式I的化合物,在化合物是酯,其中R2是C1到C6烷基,以立体选择性
水解酯键以产生酸;并分离酸,其中反应在包含80%到98%体积百分比的有机相和
水相残留物的溶剂中进行(可以缓冲)。