A process for production of a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester comprising:
(A) a step of obtaining a mixture containing a trans-2,2-dimethyl-3-(hydroxymethyl)cyclopropanecarboxylic acid ester,
(B) a step of conducting an oxidation treatment of the mixture obtained in the step (A) to obtain a mixture containing a crude trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester,
(C) a step of contacting the mixture obtained in the step (B) with an aqueous alkali metal hydrogen sulfite solution to obtain an alkali metal salt of a trans-2,2-dimethyl-3-[(hydroxy)(sulfo)methyl]cyclopropanecarboxylic acid ester, and
(D) a step of contacting the alkali metal salt obtained in the above-mentioned step (C) with a base or the like to obtain a trans-2,2-dimethyl-3-formylcyclopropanecarboxylic acid ester.
一种反式-2,2-二甲基-3-甲酰基
环丙烷羧酸酯的生产工艺,包括
(A) 第一步:获得含有反式-2,2-二甲基-3-(羟甲基)
环丙烷羧酸酯的混合物、
(B) 对步骤(A)中获得的混合物进行氧化处理,以获得含有粗反式-2,2-二甲基-3-甲酰基
环丙烷羧酸酯的混合物、
(C) 将步骤(B)中得到的混合物与碱
金属
亚硫酸氢盐水溶液接触,得到反式-2,2-二甲基-3-[(羟基)(磺基)甲基]
环丙烷羧酸酯的碱
金属盐,和
(D) 将上述步骤(C)中得到的碱
金属盐与碱或类似物质接触,得到反式-2,2-二甲基-3-甲酰基
环丙烷羧酸酯。