Herbizide Mittel

摘要

1,142,309. Urea derivatives. BADISCHE ANILIN- & SODA-FABRIK A.G. 2 June, 1966 [12 June, 1965], No. 24613/66. Heading C2C. [Also in Division A5] The invention relates to urea derivatives having the general formula in which R1 denotes a phenyl radical (which may be substituted by alkyl groups having 1-3 carbon atoms, halogen atoms, alkoxyl groups, a trifluoromethyl group or a halophenoxyl group or two or more of these substituents at the same time) or a cycloaliphatic, bicycloaliphatic or tricycloaliphatic radical (which may bear alkyl groups as substituents), R2 denotes a hydrogen atom or a methyl group and X denotes a saturated or unsaturated aliphatic radical (bearing halogen atoms, alkoxyl, aroxyl, nitro, cyano, carbalkoxyl, dialkylamino or thioalkoxyl groups as substituents), or a linear or branched, saturated or unsaturated aliphatic radical having more than one carbon atom, an aliphatic-aromatic radical or a cycloaliphatic radical. The compounds may be prepared by reacting a primary or secondary amine having the formula in which R1 and R2 are as above, in the presence of an acid-binding substance with an ethercerbamyl halide having the formula in which Hal is a halogen atom and X is as above. Many examples are given.