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。