申请人:——
公开号:US20040063993A1
公开(公告)日:2004-04-01
A process for the preparation of 4-methyl-2,3,5,6-tetrafluorobenzyl alcohol comprising hydrogenating 4-methyl-2,3,5,6-tetrafluorobenzonitrile to 4-methyl-2,3,5,6-tetrafluorobenzylamine and converting 4-methyl-2,3,5,6-tetrafluorobenzylamine to 4-methyl-2,3,5,6-tetrafluorobenzyl alcohol. The process optionally also comprises the further step of reacting 4-Methyl-2,3,5,6-tetrafluobenzyl alcohol with cis-Z-3-(2-chloro-1,1,1-trifluoro-2-propenyl)-2,2-dimethylcyclopropanecarbonyl chloride to the form tefluthrin. 4-Methyl-2,3,5,6-tetrafluorobenzylamine and salts thereof are also claimed.
一种制备4-甲基-2,3,5,6-四氟苯甲醇的方法,包括将4-甲基-2,3,5,6-四氟苯甲腈加氢制得4-甲基-2,3,5,6-四氟苯甲胺,然后将4-甲基-2,3,5,6-四氟苯甲胺转化为4-甲基-2,3,5,6-四氟苯甲醇。该方法还可以包括将4-甲基-2,3,5,6-四氟苯甲醇与顺式-Z-3-(2-氯-1,1,1-三氟-2-丙烯基)-2,2-二甲基环丙烷羧酰氯反应以形成特氟氰。同时还声明了4-甲基-2,3,5,6-四氟苯甲胺及其盐。