| 摘要 |
Novel 2-cyanobenzimidazoles of the formula (I) <IMAGE> in which R<1>, R<2> and A have the meaning given in the description, a process for their preparation, their use in agriculture, for example against fungi, insects and the like, and novel intermediates. The compounds, of which the formula (I) provides a definition, are obtained, for example, from suitable 2-cyanobenzimidazoles which are unsubstituted in the 1-position and N,N-dimethylsulphamoyl halide. The 2-cyanobenzimidazoles which are unsubstituted in the 1-position are also novel and can be reacted from suitable phenylene diamines of the formula (IV) with methyl 2,2,2-trichloroacetimidate of the formula (V) to give the 2-trichloromethylbenzimidazoles of the formula (VI) which are also novel and which, together with ammonia, give the compounds of the formula (II). |
