PROCESS FOR PRODUCING ASPARTAME DERIVATIVE, CRYSTALS THEREOF, NOVEL PRODUCTION INTERMEDIATES THEREFOR AND PROCESS FOR PRODUCING THE INTERMEDIATE
申请人:Ajinomoto Co., Inc.
公开号:EP1219633A1
公开(公告)日:2002-07-03
3-(3-Hydroxy-4-methoxyphenyl)-3-methylbutylaldehyde is produced by subjecting 3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyric acid to a reaction for converting a carboxyl group into a formyl group, whereby the carboxyl group in the butyric acid derivative is converted to a formyl group. Such 3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyric acid can be obtained by reacting 2-halogenoanisole with 3-methylcrotonic acid to produce 3-(3-halogeno-4-methoxyphenyl)-3-methylbutyric acid, and converting the halogen atom in the thus produced butyric acid derivative into a hydroxyl group.
N-[N-[3-(3-hydroxy-4-methoxyphenyl)-3-methylbutyl]-L-α-aspartyl]-L-phenylalanine 1-methyl ester useful as a sweetener having a high degree of sweetness can be easily and efficiently derived on an industrial scale from the thus obtained aldehyde derivative in the reductive alkylation reaction with aspartame. Therefore, the aldehyde derivative is highly excellent as an intermediate for the production of the sweetener.
3-(3-羟基-4-甲氧基苯基)-3-甲基丁醛是通过将 3-(3-羟基-4-甲氧基苯基)-3-甲基丁酸进行羧基转化为甲酰基的反应,从而将丁酸衍生物中的羧基转化为甲酰基而制得的。这种 3-(3-羟基-4-甲氧基苯基)-3-甲基丁酸可通过 2-卤代苯甲醚与 3-甲基巴豆酸反应生成 3-(3-卤代-4-甲氧基苯基)-3-甲基丁酸,并将由此生成的丁酸衍生物中的卤原子转化为羟基而获得。
N-[N-[3-(3-羟基-4-甲氧基苯基)-3-甲基丁基]-L-α-天冬氨酰]-L-苯丙氨酸 1-甲酯作为一种具有高甜度的甜味剂,可以通过与阿斯巴甜进行还原烷基化反应,从由此获得的醛衍生物中轻松高效地工业化生产。因此,醛衍生物作为生产甜味剂的中间体是非常出色的。