| 摘要 |
1367968 Meta-trifluoromethylphenylurea derivatives BADISCHE ANILIN- & SODAFABRIK AG 14 Jan 1972 [15 Jan 1971] 1785/72 Heading C2C The invention comprises m-trifluoromethylphenylureas of the formula where R<SP>1</SP> denotes an alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl or aryl group or the radical R<SP>3</SP>CO- where R<SP>3</SP> has the same meanings as R<SP>1</SP>, X denotes oxygen or sulphur, and R<SP>2</SP> denotes an alkyl group having 1 to 3 carbon atoms, a methoxy group or hydrogen. They may be prepared by reacting a N-m-trifluoromethylphenyl- N-α-methylether (or thioether, acyloxy or acylmercapto)-carbamoyl chloride of the formula with the appropriate amine of the formula The carbamoyl chloride (II) may be prepared by reacting N-m-trifluoromethylphenyl-N-chloromethyl carbamoyl chloride with the appropriate alcohol, mercaptan, carboxylic acid or thiocarboxylic acid. The compounds of the invention may be used as active ingredients in herbicidal compositions. |
