Alkanoic acid derivatives and herbicidal compositions.

摘要

An alkanoic acid derivative of the formula: <CHEM> wherein R<3> is a hydrogen atom, a halogen atom, a halogen-substituted alkyl group, an alkyl group, a cycloalkyl group, an alkylthioalkyl group, a hydroxyalkyl group, a hydroxyl group, a cyano group, an acyloxyalkyl group, a thienyl group, a naphthyl group, a dihydronaphthyl group or <CHEM> wherein R<8> is a hydrogen atom, a halogen atom, a nitro group, an alkyl group, an alkoxy group or -S(O)nR<9> wherein R<9> is an alkyl group, and n is an integer of from 0 to 2, m is an integer of from 0 to 2, each of R<2> and R<4> which may be the same or different is a hydrogen atom or an alkyl group, or R<2> and R<4> form together with the adjacent carbon atom a 3-, 4-, 5- or 6-membered ring which may contain an oxygen atom and may be substituted by one or two alkyl groups, each of R<5> and R<6> which may be the same or different is a hydrogen atom or an alkyl group, R<7> is an alkyl group or a phenyl group, or R<6> and R<7> form -(CH2) l - wherein l is an integer of 3 or 4 which may be substituted by one or two alkyl groups, or R is an alkenyl group, a dihydronaphthyl group, a tetrahydronaphthyl group, a 1-oxo-1,2,3,4-tetrahydronaphthyl group, a 1,2-epoxycycloalkyl group or an indanyl group which may be substituted by an alkyl or alkoxy group; R<1> is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a phenyl group, an alkylideneamino group, an alkoxyalkyl group, an alkoxycarbonylalkyl group, a halogen-substituted alkyl group, a cycloalkyl group, a nitro-substituted phenylthioalkyl group, a halogen atom or a benzyl group which may be substituted by an alkyl or alkoxy group; or R and R<1> form a ring; A is an alkyl group, an alkoxy group, an alkylthio group, a halogen atom, a halogen-substituted alkoxy group, an amino group, an alkylamino group or a dialkylamino group; B is a hydrogen atom, an alkyl group, an alkoxy group or a halogen-substituted alkoxy group; X is an oxygen atom or a sulfur atom; and Z is a methine group or a nitrogen atom; and a salt thereof.