申请人:Ajinomoto Co., Inc.
公开号:EP1724253A3
公开(公告)日:2009-11-04
The present invention provides a production method including reacting a diphenylmethylene halide compound represented by the following formula (1) with a malonic acid diester compound represented by the following formula (2) in an organic solvent selected from N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone and N,N-dimethylformamide, in the presence of a base selected from an alkali metal hydride and an alkali metal t-butoxide to give a diester compound represented by the following formula (3), and then subjecting the diester compound to hydrolysis and decarboxylation to give a diphenylalanine compound represented by the following formula (4).
According to the present invention, diphenylalanine compound (4) can be obtained industrially advantageously in a high yield.
wherein each symbol is as defined in the specification.
本发明提供了一种生产方法,包括在选自N-甲基-2-吡咯烷酮、N-乙基-2-吡咯烷酮和N,N-二甲基甲酰胺的有机溶剂中,在选择自碱金属氢化物和碱金属叔丁醇盐的碱的存在下,将以下式(1)所表示的二苯甲基卤化物化合物与以下式(2)所表示的丙二酸二酯化合物反应,得到以下式(3)所表示的二酯化合物,然后将二酯化合物进行水解和脱羧,得到以下式(4)所表示的二苯丙氨酸化合物。根据本发明,可以在高收率下工业上优势地获得二苯丙氨酸化合物(4)。其中,每个符号如规范中所定义。