Cyanophenoxy-phenoxypentenoic acid derivative, process for the preparation thereof and herbicide composition containing the same
申请人:Kanesho Co., Ltd.
公开号:EP0101094A1
公开(公告)日:1984-02-22
A cyanophenoxy-phenoxypentenoic acid derivative which is excellent in selective herbicide function to kill weeds of Gramineae family and harmless to cereal plants. The cyanophenoxy-phenoxypentenoic acid derivative is represented by the general formula of:
wherein R1 is hydrogen, chlorine or bromine atom, X is
oxygen or sulfur atom, and R2 is hydrogen atom, cation,
alkyl, fluoroalkyl, benzyl or -N=C(dialkyl) group. The cyanophenoxy-phenoxypentenoic acid is prepared by reacting, in the presence of a base, a cyanophenoxy-phenol derivative represented by the general formula of:
wherein R, is the same as set forth above; with a 4-halocarboxylic acid derivative represented by the general formula of:
wherein A is
or -CH=CH-, Hal is a halogen atom and X and R2 is the same as set forth above.
一种氰基苯氧基苯氧基戊烯酸衍生物,具有优异的选择性除草功能,可杀死禾本科杂草,对谷类植物无害。氰基苯氧基苯氧基戊烯酸衍生物的通式为
其中 R1 是氢、氯或溴原子,X 是
氧原子或硫原子,R2 是氢原子、阳离子、烷基、氟烷基、阴离子或阳离子、
烷基、氟烷基、苄基或 -N=C(二烷基)基团。氰基苯氧基苯氧基戊烯酸的制备方法是在碱存在下,使通式如下的氰基苯氧基苯酚衍生物发生反应:
其中 R 与上述相同;4-卤代羧酸衍生物的通式为
其中 A 是
或-CH=CH-,Hal 是卤素原子,X 和 R2 与上述相同。