申请人:UNION CARBIDE CORPORATION
公开号:EP0105735A2
公开(公告)日:1984-04-18
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: wherein:
X and X' are independently oxygen, sulfur, or a carbon-carbon, carbon-oxygen, or a carbon-sulfur single bond with the proviso that X and X' may not both be a carbon-carbon single bond at the same time;
Z is oxygen or sulfur;
R, is hydrogen, C1-C8 alkyl, or C1-C3 alkoxy;
R2-R6 are independently hydrogen, C1-C10 alkyl, halogen,
cyano, nitro, trifluoromethyl, C1-C6 alkoxyl, or substituted phenoxy; R6 may also be keto when attached to a saturated ring;
R7-R9 are independently hydrogen or lower (CI-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.
所提供的尿素化合物主要对阔叶杂草具有萌发后防除作用,而且对大豆、玉米、小麦和其他作物具有显著的选择性。
这些化合物具有通式: 其中
X 和 X'分别为氧、硫或碳-碳、碳-氧或碳-硫单键,但 X 和 X'不能同时为碳-碳单键;
Z 是氧或硫;
R 是氢、C1-C8 烷基或 C1-C3 烷氧基;
R2-R6独立地为氢、C1-C10烷基、卤素、氰基、硝基、三氟乙烷或三氟丙烷、
氰基、硝基、三氟甲基、C1-C6 烷氧基或取代的苯氧基;R6 连接到饱和环时也可能是酮基;
R7-R9 独立地为氢或低(CI-C3)烷基;以及
m 和 n 代表 0-10 范围内相同或不同的整数,但当 A 为 2-萘基时,m 和 n 不能都为 0。