申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0152174A2
公开(公告)日:1985-08-21
57 Benzene di- and tri-methanol compounds are selectively halogenated by reaction in aqueous solution at 70 to below 100°C with NCl or HBr in the presence of a water immiscible solvent eg. toluene. The process is particularly suitable for the preparation of 4-bromo- and 4-chloromethyl-2,3,5,6-tetrafluorobenzene methanols which are believed to be novel compounds and useful in the synthesis of pesticidal compounds.
57 苯二甲醇和苯三甲醇化合物在水溶液中与 NCl 或 HBr 在不溶于水的溶剂(如甲苯)存在下于 70 至低于 100°C 的温度下反应,从而选择性地卤化。该工艺特别适用于制备 4-溴和 4-氯甲基-2,3,5,6-四氟苯甲醇,这些甲醇被认为是新型化合物,可用于合成杀虫剂化合物。