EP0567133A1 — Picolinic acid derivative and herbicidal composition

USPTO Abstract

A picolinic acid derivative of the formula: wherein each of R¹ and R² is an alkoxy group, X¹ is a group of the formula wherein R³ is a hydrogen atom, an alkyl group, a haloalkyl group, an alkoxyalkyl group, an alkenyl group, an alkynyl group, an alkylcarbonyl group, a benzyloxycarbonyl group or a phenylsulfonyl group, R⁴ is defined as in the description and R⁹ is a hydrogen atom, an alkyl group, an alkenyl group, a benzyl group, an alkali metal atom, an alkaline earth metal atom or an organic amine cation; or a salt thereof, or a picolinic acid derivative of the formula: wherein each of R¹ and R² is an alkoxy group, X² is an amino group, an alkylamino group or a dialkylamino group, and W is COOR¹⁰, COSR¹¹ or wherein R¹⁰ is a phenyl group (which may be substituted by a halogen atom or a methyl group), a benzyloxyalkyl group, an alkylideneamino group, a cycloalkylideneamino group or a dialkylamino group, R¹¹ is an alkyl group or a phenyl group, and each of R¹² and R¹³ which may be the same or different, is a hydrogen atom, an alkylsulfonyl group, an alkoxyalkyl group, an alkyl group, a benzyloxy group or an alkoxy group, or R¹² and R¹³ form together with the adjacent nitrogen atom, an imidazolyl group; or a salt thereof, or a picolinic acid derivative of the formula: wherein each of R¹ and R² is an alkoxy group, X² is an amino group, an alkylamino group or a dialkylamino group, Y is a methylene group which may be substituted by a cyano group, or a carbonyl group, and R¹⁴ is a hydrogen atom or an alkyl group; or a salt thereof, or a picolinic acid derivative of the formula: wherein each of R¹ and R² is an alkoxy group, X³ is a dialkylamino group, Z is a group of the formula R⁺A⁻ wherein R⁺ is a cation selected from the group consisting of an alkyl group, an acyl group and an alkylsulfonyl group, and A⁻ is an anion of the conjugate base, and R¹⁵ is an alkyl group; or a salt thereof, and a herbicidal composition comprising a herbicidally effective amount of a picolinic acid derivative of the formulae (I) to (IV) or a salt thereof and an agricultural adjuvant.