N-[N-[3-(2-hydroxy-substituted phenyl)propyl]-L-&agr;-aspartyl]-L-phenylalanine 1-methyl ester derivatives, which are useful as sweeteners, may be conveniently produced by subjecting a 2-hydroxychroman derivative having various substituents on the benzene ring and aspartame to a reductive alkylation reaction. These compounds may be purified by subjecting such a derivative containing one or more impurities to a crystallization step to crystallize the same.
Further, there are provided a process for producing dialkoxychroman derivatives useful as intermediates for the production of such aspartame derivatives in the above process, and novel dialkoxychroman derivatives thus produced, which are excellent as the production intermediate.
这段文字的含义是:
N-[N-3-(2-羟基取代苯基)丙基]-L-α-
天冬氨酸-
L-苯丙氨酸1-甲基酯衍
生物可用作
甜味剂,可通过将具有苯环上不同取代基的2-羟基
色酮衍
生物和
阿斯巴甜进行还原烷基化反应来方便地制备。这些化合物可以通过将含有一种或多种杂质的衍
生物经过结晶步骤结晶来纯化。此外,还提供了一种用于生产上述过程中的
阿斯巴甜衍
生物的中间体的二烷氧基
色酮衍
生物的生产过程,以及由此产生的新型二烷氧基
色酮衍
生物,其作为生产中间体非常优秀。