Optically active 3-(4-methoxyphenyl)glycidic acid alkyl esters of high enantiomeric purity can be prepared through optical resolution of a racemic or optically enriched sample of a 3-(4-methoxyphenyl) glycidic acid. The alkali metal salt of the acid, generated in situ by hydrolysis of the corresponding alkyl ester with an alkali metal hdyroxide is contacted with a suitable resolving agent such as an optically pure amine to form the corresponding diastereomeric salts. The desired diastereomeric salt is separated from the mixture and transformed to an alkali metal salt, which optionally without isolation is converted into the desired alkyl ester of high enantiomeric purity.
光学活性高对映体纯度的 3-(4-
甲氧基苯基)
缩水甘油酸烷基酯可通过外消旋或光学富集的 3-(4-
甲氧基苯基)
缩水甘油酸样品的光学解析来制备。通过用碱
金属氢氧化物
水解相应的烷基酯在原位生成的酸的碱
金属盐与合适的分辨剂(如光学纯胺)接触,形成相应的非对映异构盐。从混合物中分离出所需的非对映异构盐,并将其转化为碱
金属盐,然后不经分离将其转化为对映纯度高的所需烷基酯。