| 摘要 |
<p>Urea compounds are provided which exhibit primarily post-emergence control of broadleaf weeds and which also show a remarkable degree of selectivity for soybeans, corn, wheat and other crops. The compounds have the general formula: <CHEM> X and X min are independently oxygen, sulfur, or a carbon-carbon, carbon-oxygen, or a carbon-sulfur single bond with the proviso that X and X min may not both be a carbon-carbon single bond at the same time; Z is oxygen or sulfur; R1 is hydrogen, C1-C8 alkyl, or C1-C3 alkoxy; R2-R6 are independently hydrogen, C1-C10 alkyl, halogen, cyano, nitro, trifluoromethyl, C1-C5 alkoxyl, or substituted phenoxy; R6 may also be keto when attached to a saturated ring; R7-R9 are independently hydrogen or lower (C1-C3) alkyl; and m and n represent the same or different integers in the range 0 to 10 with the proviso that m and n may not both be zero when A is 2-napthyl.</p> |
