Novel process for preparing...

C - Chemistry – Metallurgy – 07 – D

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C07D 239/60 (2006.01) C07D 405/12 (2006.01) C07D 405/14 (2006.01) C07D 409/14 (2006.01)

Patent

CA 2194080

A process for preparing a 2,6-di(4,6-dimethoxy- pyrimidin-2-yl)oxybenzoic acid oxime ester derivative, having a herbicidal activity and the following formula (I), (see fig. I) (I) in which R1 represents hydrogen halogen, cyano, nitro, alkyl, cycloalkyl, alkoxy, alkenyloxy, alkylthio, amino which can be substituted with alkyl, aryl, aryloxy, acyl or acyloxy, n denotes an integer of 1 to 5, and R2 represents hydrogen, halogen, cyano, nitro, alkyl, alkoxy, alkylthio, alkoxycarbonyl, alkenyloxycarbonyl, arylmethoxycarbonyl, heteroarylmethoxy carbonyl, alkylaminocarbonyl, di (alkyl) aminocarbonyl, arylmethylaminocarbonyl, heteroarylmethylaminocarbonyl, or phenyl which can be substituted with R1. The process comprise reacting a compound having the following formula (V), (see fig II) (V) in which R represents hydrogen or alkali metal cation, with a pyrimidine derivative having the following formula (VI), (see fig. III) (VI) in which Z represents halogen, alkylsulfonyl or aryl- sulfonyl.

rocédé pour préparer un dérivé de l'ester de l'oxime de l'acide 2,6-di(4,6-diméthoxy- pyrimidin-2-yl)oxybenzoïque, ayant une activité herbicide et de formule suivante (I), (voir fig. I) (I) où R1 est un hydrogène, un halogène, un groupement cyano, nitro, alkyle, cycloalkyle, alkoxy, alkényloxy, alkylthio, amino qui peuvent être substitués par un alkyle, un aryle, un aryloxy, un acyle ou un acyloxy, n représente un nombre entier compris entre 1 et 5, et R2 est un hydrogène, un halogène, un groupe cyano, nitro, alkyle, alkoxy, alkylthio, alkoxycarbonyle, alkényloxycarbonyle, arylméthoxycarbonyle, hétéroarylméthoxycarbonyle, alkylaminocarbonyle, di(alkyl) aminocarbonyle, arylméthylaminocarbonyle, hétéroarylméthylaminocarbonyle, ou phényle qui peuvent être substitués par R1. Le procédé comprend la réaction d'un composé de la formule suivante (V), (voir fig II) (V) dans lequel R est un hydrogène ou un cation d'un métal alcalin, avec un dérivé de la pyrimidine ayant la formule suivante (VI), (voir fig. III) (VI) où Z est un halogène, un alkylsulfonyle ou un arylsulfonyle.

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