| 摘要 |
<p>The present invention relates to novel 1,3,4-thiadiazol-2-ylureas characterized by a cyanoalkyl group at the 5position. The alkyl group to which the cyano group is attached is always branched, and is preferably branched at the carbon atom adjacent to the ring. The compounds are also characterized by small alkyl or alkoxy groups on the urea nitrogens. The new compounds are outstandingly effective herbicides and are also effective, when used at low application rates, in the control of plant pathogens. They are produced by reacting a 2-alkylamino-5-cyanoalkyl-1,3,4-thiadiazole with an alkylisocyanoate or an alkyl-substituted carbamoyl chloride.</p> |
