申请人:Ciba-Geigy Corporation
公开号:US04351961A1
公开(公告)日:1982-09-28
Compounds of the formula I ##STR1## wherein X is chlorine or fluorine, are suitable for producing 2,2-dimethyl-3-(2'-chloro-3',3',3'-trifluoroprop-1'-en-1'-yl)- and 2,2-dimethyl-3-(2',3'-dichloro-3',3'-difluoroprop-1'-en-1'-yl)-cyclopropan ecarboxylic acids and insecticidally effective esters thereof (pyrethroids). The cyclobutanones (I) can be produced by the addition reaction of 2,4,4,5-tetrachloro-5,5-difluoro- or 2,4,4-trichloro-5,5,5-trifluoropentane-1-carboxylic acid chloride with isobutylene, and rearrangement of the resulting 2-chloro-2-(2',2',3'-trichloro-3',3'-difluoropropyl)- or 2-chloro-2-(2',2'-dichloro-3',3',3'-trifluoropropyl)-3,3-dimethylcyclobuta n-1-one in the presence of catalysts.
式I的化合物##STR1##其中X为氯或氟,适用于生产2,2-二甲基-3-(2'-氯-3',3',3'-三氟丙-1'-烯-1'-基)-和2,2-二甲基-3-(2',3'-二氯-3',3'-二氟丙-1'-烯-1'-基)-环丙烷羧酸及其杀虫酯类(拟除虫菊酯)。环丁酮(I)可通过2,4,4,5-四氯-5,5-二氟或2,4,4-三氯-5,5,5-三氟戊酸氯与异丁烯的加成反应,并在催化剂的存在下重排所得的2-氯-2-(2',2',3'-三氯-3',3'-二氟丙基)-或2-氯-2-(2',2'-二氯-3',3',3'-三氟丙基)-3,3-二甲基环丁酮制备。