申请人:MITSUBISHI RAYON CO., LTD.
公开号:EP0172614A1
公开(公告)日:1986-02-26
Optically active carboxylic acid amides of the formula;
wherein R, is an alkyl group, an aralkyl group or an aryl group, R2 is an alkyl group, R4 is a hydroxyl group, an amino group or an alkoxy group, and X is a methylene group or a sulfur atom, which are useful as a medicine, is advantageously prepared by allowing carbothioic acids of the formula:
wherein R, is as defined above, to react with unsaturated carboxylic acid esters of the formula;
wherein R2 and R3 each represent an alkyl group, biochemically and asymmetrically hydrolyzing the resulting esters to give optically active carboxylic acids of the formula;
wherein R, and R2 are as defined above, and allowing the optically active carboxylic acids to react with amine compounds of the formula;
wherein R4 and X are as defined above. I
式中的光学活性羧酸酰胺;
其中 R 是烷基、芳基或芳基,R2 是烷基,R4 是羟基、氨基或烷氧基,X 是亚甲基或硫原子:
式中的硫代碳酸与式中的不饱和羧酸酯反应;
其中 R2 和 R3 各代表一个烷基,将生成的酯进行生物化学和不对称水解,得到具有光学活性的式羧酸;
其中 R 和 R2 如上定义,并使光学活性羧酸与式中的胺化合物反应;
其中 R4 和 X 如上文所定义。I