申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0485069A1
公开(公告)日:1992-05-13
Disclosed is a process for producing an optically active amine represented by the formula (IV)
wherein R₇ and R₈ each independently denote an alkyl group, aryl group or aralkyl group which said alkyl, aryl or aralky group is optionally substitued, providing that they do not denote the same specific group at the same time, and * indicates an asymmetric carbon atom, which comprises reacting an asymmetric reducing agent obtained from (1) an optically active amine derivative represented by the formula (I)
wherein R₁ denotes an alkyl group, aryl group, or aralkyl group; R₂ denotes a hydrogen atom, alkyl group or aralkyl group; R₃ denotes an alkyl group, an aryl group which said alkyl or aryl group is optionally substituted, or a substituent represented by the formula (II)
wherein R₄ and R₅ each independently denote a hydrogen atom, alkyl group, aryl group or aralkyl group which said alkyl, aryl or aralkyl group is optionally substituted and * is a defined above, (2) a metal borohydride and (3) sulfuric acid,
with either the syn-isomer or the anti-isomer of an oxime derivative represented by the formula (III) or with a mixture rich in either one of the two isomers
wherein R₆ denotes an alkyl group, aralkyl group or alkyl-substituted silyl group, and R₇ and R₈ are as defined above.
The optically active amine obtained can be used as a resolving agent for preparing medicinal agents, agricultural chemicals, or intermediates thereof.
本发明公开了一种由式(IV)表示的光学活性胺的生产工艺
其中,R₇ 和 R₈ 各自独立地表示烷基、芳基或芳烷基,所述烷基、芳基或芳烷基可任选地被取代,但它们不能同时表示相同的特定基团,且 * 表示不对称碳原子,该工艺包括使由 (1) 式 (I) 所代表的光学活性胺衍生物得到的不对称还原剂进行反应
其中 R₁ 表示烷基、芳基或芳烷基;R₂ 表示氢原子、烷基或芳烷基;R₃ 表示烷基、芳基(所述烷基或芳基被任选取代)或式 (II) 所代表的取代基
其中,R₄ 和 R₅ 各自独立地表示氢原子、烷基、芳基或芳烷基,其中所述烷基、芳基或芳烷基任选被取代,且 * 如上定义;(2) 金属硼氢化物;(3) 硫酸、
与式 (III) 所代表的肟衍生物的同分异构体或反异构体,或与富含这两种异构体中任何一种的混合物混合
其中 R₆ 表示烷基、芳烷基或烷基取代的硅烷基,R₇ 和 R₈ 如上定义。
得到的光学活性胺可用作制备药剂、农药或其中间体的溶解剂。