| 摘要 |
NEW MATERIAL:The compound of formula I (R is lower alkyl; X is H, halogen, lower alkyl, lower alkoxy, benzyloxy, or lower haloalkyl; n is 1-3). EXAMPLE:3, 3' -Dimethyl- 4 -methylcarbamoyloxyimidazolidin- 2 -one-1-carboxanilide. USE:A herbicide. It exhibits strong herbicidal effect against the weeds such as Yerba de tajo, green amaranth, Indian jointvetch, etc. and is useful for the control of the weeds harmful to the production and appearance of the fields of orange, soybean, corn, mulberry, tea, paddy rice plant, etc. Rate of application: 5-400 grams of the active component per 1 Are. PREPARATION:The compound of formula I can be prepared preferably by reacting the imidazolidin-2-one derivative of formula II (novel compound) with the isocyanate of formula III in the presence or absence of solvent, in the presence of a catalyst at 0-150 deg.C for 3-15hr.
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