申请人:KUMIAI CHEMICAL INDUSTRY CO., LTD.
公开号:EP0752424A1
公开(公告)日:1997-01-08
A nicotinic acid derivative represented by the general formula
[wherein A a substituted phenyl group or a 5- or 6-membered hererocyclic ring (e.g., a thienyl group or a pyridyl group), R is a hydroxyl group, an optionally substituted alkoxy group or an optionally substituted benzyloxy group, each of R1 and R2 which may be the same or different, is an alkoxy group or a halogen atom, each of R3 and R4 which may be the same or different, is a hydrogen atom, a hydroxyl group, a cyano group or an alkoxycarbonyl group, or R3 and R4 may together represent an oxygen atom, X is a halogen atom, an alkyl group or an alkoxy group, n is 0 or an integer of from 1 to 2, and Z is a methine group or a nitrogen atom] or a salt thereof, and a herbicide containing it as an active ingredient.
The compound and salts thereof can control annual and/or perennial weeds growing on the land where various crops such as rice, wheat, cotton and corn grow over a broad period from the pre-emergence season to the growing season in a remarkably small dose.
由通式代表的烟酸衍生物
[其中 A 为取代的苯基或 5 或 6 元异环(如噻吩基或吡啶基),R 为羟基、任选取代的烷氧基或任选取代的苄氧基、噻吩基或吡啶基),R 是羟基、任选取代的烷氧基或任选取代的苄氧基,R1 和 R2 可以相同或不同,各自是烷氧基或卤素原子,R3 和 R4 可以相同或不同,各自是氢原子、羟基、氰基或烷氧基羰基,或 R3 和 R4 可共同代表氧原子,X 为卤素原子、烷基或烷氧基,n 为 0 或 1 至 2 的整数,Z 为甲基或氮原子]或其盐,以及含有其作为活性成分的除草剂。
这种化合物及其盐类能以极小的剂量控制生长在水稻、小麦、棉花和玉米等各种农作物上的一年生和/或多年生杂草,控制时间从萌芽前到生长期。