摘要
3-羟基-2,4,5-三氟苯甲酸酯化后在溴化四丁铵参与下与二氟氯甲烷进行醚化反应得到3-二氟甲氧基-2,4,5-三氟苯甲酸乙酯,再经水解得到氟喹诺酮类抗菌剂的中间体3-二氟甲氧基-2,4,5-三氟苯甲酸,总收率74%。
Difluoromethoxy-2,4,5-trifluorobenzoic acid was synthesized from 3-hydroxy-2,4,5-trifluorobenzoicacid by esterification, etherification with CHClF2 in presence of Bu4NBr to afford ethyl 3-difluromethoxy-2,4,5-trifluorobenzoate which subjected to hydrolysis in an overall yield of 74%.
出处
《中国医药工业杂志》
CAS
CSCD
北大核心
2004年第11期648-649,共2页
Chinese Journal of Pharmaceuticals