2,2-Dimethyl-3-arylcyclopropanecarboxylic acids and esters, suitable as insecticide intermediates, of the formula ##STR1## in which Ar is naphthyl or substituted furyl, thienyl or phenyl, and R.sup.1 is hydrogen or alkyl, are produced by subjecting ##STR2## to radical polymerization to produce ##STR3## reacting that with chlorine or bromine to produce ##STR4## and reacting that with an alkali metal or alkaline earth metal hydroxide or carbonate. Various intermediates II and III are new.
2,2-二甲基-3-芳基
环丙烷羧酸和酯,适用作
杀虫剂中间体,其
化学式为##STR1##其中Ar为
萘基或取代的
呋喃基、
噻吩基或苯基,R.sup.1为氢或烷基,通过将##STR2##经受自由基聚合制备##STR3##,将其与
氯或
溴反应制备##STR4##,再将其与碱
金属或碱土
金属的氢氧化物或
碳酸盐反应而制备。各种中间体II和III是新的。