The present invention provides a process for easily preparing a (S)-α-halomethylpyridine-methanol derivative, which is useful as an intermediate of pharmaceutical products, from inexpensive raw materials. The (S)-α-halomethylpyridine-methanol derivative is prepared by (S)-selectively reducing a 2-haloacetylpyridine derivative using an enzyme source having ability to (S)-selectively reduce a carbonyl group of the 2-haloacetylpyridine derivative, which can be obtained inexpensively. Also, a hydrohalic acid salt of (S)-α-halomethyl-3-pyridine-methanol derivative is isolated and purified as crystal from a (S)-α-halomethyl-3-pyridine-methanol derivative containing impurities using hydrohalic acid and an organic solvent.
本发明提供了一种从廉价原料中轻松制备(S)-α-卤
甲基吡啶-
甲醇衍
生物的方法,该衍
生物可用作制药产品的中间体。该(S)-α-卤
甲基吡啶-
甲醇衍
生物是通过使用具有(S)-选择性还原2-卤乙酰
吡啶衍生物的
羧酸还原酶源制备的,该酶源能够(S)-选择性地还原2-卤乙酰
吡啶衍生物,而该酶源可以廉价获得。此外,使用氢卤酸和有机溶剂从含杂质的(S)-α-卤甲基-
3-吡啶甲醇衍
生物中分离纯化出(S)-α-卤甲基-
3-吡啶甲醇衍
生物的氢卤酸盐晶体。