Pesticidal compounds of formula I, the preparation of such compounds, intermediates for use in their preparation compositions containing such compounds and the use of such compounds and compositions to prevent or control pest infestation. Compounds of I have the following formula:
in which formula:
RA represents a group ArCR1R2- in which Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, haloalkoxy, methylenedioxy or Cl-C6 alkyl groups;
R1 representing methyl, ethyl, isopropyl or cycloalkyl;
R2 representing hydrogenn or methyl; or
R1 and R2 together with the carbon to which they are attached representing joindy a cycloalkyl group optionally carrying one or more halogon substituents;
or RA represents the residue uf a pyrethroidal acid RAC02H the 5-benzyl-3-furylmethyl ester of which is significantly insecticidal;
RB represents the residue of an alcohol RBCHDOH in which D is hydrogen or cyano and of which the [IR, cis] 2,2-dimethyl-3-12,2-dibromovinyl)cyclopropane carboxylic ester is significantly insecticidal, provided that then the alcohol is of formula II:
RA is other than the residue of chrysanthemic acid.
式 I 的杀虫化合物、此类化合物的制备方法、用于制备含有此类化合物的组合物的中间体,以及使用此类化合物和组合物预防或控制虫害。式 I 的化合物具有下式:
式中
RA代表基团ArCR1R2- 其中Ar代表任选被一个或多个卤素、卤代烷氧基、亚甲基二氧基或Cl-C6烷基取代的苯基或
萘基;
R1 代表甲基、乙基、异丙基或环烷基;
R2 代表氢或甲基;或
R1 和 R2 与它们所连接的碳一起代表环烷基,可选择带有一个或多个卤素取代基;
或 RA 代表拟
除虫菊酯酸 RAC02H 的残基,其 5-苄基-3-
呋喃甲基酯具有显著的杀虫效果;
RB 代表醇 RBCHDOH 的残余物,其中 D 为氢或
氰基,其[IR,顺式] 2,2-二甲基-3-12,2-二
溴乙烯基)
环丙烷羧酸酯具有显著的杀虫作用,条件是该醇为式 II:
RA不是
菊酸的残余物。