申请人:Bayer Aktiengesellschaft
公开号:US04307033A1
公开(公告)日:1981-12-22
3,3-Dimethyl-cyclopropane-1,1,2-tricarboxylic acid derivatives of the formula ##STR1## in which R is alkyl, and R.sup.1 and R.sup.2 each is alkoxycarbonyl or cyano, with the proviso that at least one of them is cyano, suitable for use as intermediates in making insecticides, are produced by reacting a .beta.,.beta.-dimethyl-acrylic acid nitrile of the formula ##STR2## with bromine or chlorine at a temperature between about -20.degree. and +50.degree. C. to produce a compound of the formula ##STR3## in which Hal is chlorine or bromine, which compound is further reacted with a malonic acid derivative of the formula ##STR4##
公式为##STR1##的3,3-二甲基环丙烷-1,1,2-三羧酸衍生物,其中R是烷基,R.sup.1和R.sup.2分别是烷氧羰基或氰基,但至少其中一个是氰基,适用于作为制造杀虫剂的中间体,通过将公式为##STR2##的β,β-二甲基丙烯酸腈与溴或氯在约-20度至+50度C的温度下反应而生成,得到公式为##STR3##的化合物,其中Hal为氯或溴,然后将该化合物进一步与公式为##STR4##的丙二酸衍生物发生反应。