申请人:Takasago International Corporation
公开号:EP0295109A1
公开(公告)日:1988-12-14
A β-keto acid derivative (1 mol) of formula (II):
where R¹ is optionally substituted C1-7 alkyl, trifluoromethyl or aryl, R² is C1-8 alkoxy, SR⁵ where R⁵ is C1-8 alkyl or phenyl or -NR⁶R⁷ where R⁶ and R⁷ are H, C1-8 alkyl or benzyl, and R³ is H, halogen, C1-8 alkyl or alkoxycarbonyl of R¹+R³ form a methylene chain, is dissolved in a solvent and there is added 100-1/50,000 mol of a ruthenium-optically active phosphine derivative as catalyst, e.g. of formula RuxHyClz(R⁸-BINAP)₂(S)p (III) or [RuHl(R⁸-BINAP)v]Yw (V) wherein BINAP is a specified tertiary phosphine group.
The derivative is reacted with hydrogen at a pressure of 5-100 kg/cm2 for 1-48 hours and there is recovered as product an optically active alcohol of the formula (I) wherein the =C=O group has become CH-OH.
一种式(II)的β-酮酸衍生物(1 mol):
其中 R¹ 是任选取代的 C1-7 烷基、三氟甲基或芳基,R² 是 C1-8 烷氧基,SR⁵ 其中 R⁵ 是 C1-8 烷基或苯基,或 -NR⁶R⁷ 其中 R⁶ 和 R⁷ 是 H、C1-8 烷基或苄基,R³ 是 H、将 R¹+R³ 形成亚甲基链的卤素、C1-8 烷基或烷氧基羰基溶解在溶剂中,并加入 100-1/50,000 摩尔的钌光活性膦衍生物作为催化剂,例如例如,式 RuxHyClz(R⁸-BINAP)₂(S)p (III) 或 [RuHl(R⁸-BINAP)v]Yw (V) 其中 BINAP 是特定的叔膦基团。
在 5-100 kg/cm2 的压力下,将该衍生物与氢反应 1-48 小时,回收式 (I) 的光学活性醇,其中 =C=O 基团变为 CH-OH。