| 摘要 |
<p>NEW MATERIAL:A compound expressed by formula I (R is formulas II-V). EXAMPLE:(3,5-Dimethyl-isoxazol-4-yl)-methyl 2-[4-(3-chloro-5-trifluoromethyl-2- pyridyox)-phenoxy]propionate. USE:A selective herbicide capable of exhibiting excellent selectivity for cultivated crops, such as beans, cotton, carrot, potato, beet, cabbage and mustard, and showing controlling effects on gramineous weeds, such as barnyard grass, large crabgrass, goosegrass, grem foxtail and wild oats. PREPARATION:A compound expressed by formula VI is reacted with a compound expressed by the formula HOR in the presence of a base (e.g., potassium carbonate) in the presence or absence of a solvent (e.g., acetonitrile) at 0-150 deg.C temperature to afford the aimed compound expressed by formula I.</p> |
