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By means of hydrolyzation, partly decarboxylation, methyla-tion, acidification the intermediate product, 2,4,5-trifluoro-3-methoxyl benzoic acid can be got.
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合成1-环丙基-6,7-二氟-8-甲氧基-1,4-二氢4-氧代喹啉-3-羧酸乙酯,以四氟邻苯二甲酸为起始原料,经水解、部分脱羧、甲基化、酸化得到中间体2,4,5-三氟-3-甲氧基苯甲酸,中间体再经酰氯化、缩合、脱羧、醚化、环丙胺置换,环合得本品,实验收率为37。 |