申请人:Takasago International Corporation
公开号:EP0272787A2
公开(公告)日:1988-06-29
A carboxylic acid having optically active C atom, of formula:
wherein R1, R2 and R3 each represents hydrogen, alkyl, alkenyl, or phenyl or naphthyl which may have a substituent, provided that all of R1 to R3 are not simultaneously hydrogen; when R1 and R2 are both hydrogen then R3 is not methyl and when R3 is hydrogen, R1 and R2 are each other than hydrogen, is produced by dissolving an a,β-unsaturated carboxylic acid represented by the formula:
in an aprotic solvent, optionally adding equimolar tertiary amine and adding a ruthenium-optically active phosphine complex as a catalyst, hydrogenating under pressure of 4-135 kg/cm2, and distilling off the solvent.
Three classes of such catalyst, containing a 'BINAP' group, are shown, and syntheses thereof.
The carboxylic acids produced can be used as raw materials for syntheses, e.g. of physiologically active substances of natural materials, and also as liquid crystal materials.
具有光学活性 C 原子的羧酸,其式如下
式中 R1、R2 和 R3 分别代表氢、烷基、烯基或苯基或萘基,它们可以有一个取代基,但 R1 至 R3 不能同时为氢;当 R1 和 R2 都为氢时,R3 不是甲基,当 R3 为氢时,R1 和 R2 不是氢:
将 a,β-不饱和羧酸溶解于非烷基溶剂中,选择性地加入等摩尔叔胺,并加入钌-光活性膦络合物作为催化剂,在 4-135 kg/cm2 的压力下进行氢化,然后蒸馏掉溶剂。
图中展示了三类含有 "BINAP "基团的催化剂及其合成方法。
生成的羧酸可用作合成原料,如天然材料中的生理活性物质,也可用作液晶材料。