| 摘要 |
NEW MATERIAL:A carbamoyltriazole derivative expressed by formula I (R<1> and R<2> are lower alkyl or lower alkenyl or R<1> and R<2> together form alkylene; R<3> is H, methyl or halogen; n is 0, 1 or 2; X is O or S). EXAMPLE:1-Diethylcarbamoyl-3-(2-thenylthio)-1,2,4-triazole. USE:Useful as a herbicide, and capable of exhibiting efficacy against various weeds of question by soil treatment, foliar treatment and treatment under flooded conditions before or after germination of the weeds as the herbicide in paddy field, upland field, orchard, pasture, lawn, forest, etc., without phytotoxicity to main crops, rice plants, etc. PREPARATION:For example, a trizole derivative expressed by formula II is reacted with a carbamoyl halide expressed by formula III (Y is halogen) in the presence of a dehydrohalogenating agent in a solvent at 0-150 deg.C to give the aimed compound expressed by formula I. |
