| 摘要 |
NEW MATERIAL:The compound of formula I (R1 is lower alkyl; R2 is methyl, methylthio or methanesulfonamido) and its metal salt. EXAMPLE:2-[ 1-(3-Chloroallyloxyimino)propyl ]-3-hydroxy-5-( 4-methane-sulfonamidophenyl)-2-cyclohexen-1-one. USE:A herbicide. The characteristic feature of the herbicide is high activity to even a grown weed in a wheat field at a low rate of application. PREPARATION:The compound of formula I can be prepared by reacting the compound of formula II with 3-chloroallyloxyamine in an inert solvent. The reaction is carried out at a temperature between room temperature and the boiling point of the solvent, preferably at room temperature or under mild heating, in a solvent such as alcohol, ether, benzene, etc.
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