PROCESSES FOR PRODUCING AND PURIFYING ASPARTAME DERIVATIVES AND PROCESS FOR PRODUCING PRODUCTION INTERMEDIATES
申请人:Ajinomoto Co., Inc.
公开号:EP1227104A1
公开(公告)日:2002-07-31
There are provided a process for producing an N-[N-[3-(2-hydroxy-substituted phenyl)propyl]-L-α-aspartyl]-L-phenylalanine 1-methyl ester derivative, which is useful as a sweetener, by subjecting a 2-hydroxychroman derivative having various substituents in a benzene ring and an aspartame to a reductive alkylation reaction, and a process for purifying the same by subjecting such derivative containing impurity(ies) to a crystallization step to crystallize the same.
Further, there are provided a process for producing a dialkoxychroman derivative useful as a production intermediate for the above aspartame derivative in the above process, and novel dialkoxychroman derivatives thus produced, and excellent as the production intermediate.
提供了一种生产 N-[N-[3-(2-羟基取代苯基)丙基]-L-α-天冬氨酰]-L-苯丙氨酸 1-甲酯衍生物的工艺,该衍生物可用作甜味剂、将苯环上具有各种取代基的 2-羟基苯并二氢吡喃衍生物和阿斯巴甜进行还原烷基化反应,以及将含有杂质的该衍生物进行结晶步骤使其结晶,从而提纯该衍生物的工艺。
此外,还提供了一种生产二烷氧基苯并二氢吡喃衍生物的工艺,在上述工艺中,该衍生物可作为上述天冬酰胺衍生物的生产中间体,还提供了由此生产的新型二烷氧基苯并二氢吡喃衍生物,以及作为生产中间体的优良衍生物。