NOVEL PROCESS FOR PREPARING 2,6-DI(4,6-DIMETHOXYPYRIMIDIN-2-YL) OXYBENZOIC ACID OXIME ESTER DERIVATIVES

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 arylsulfonyl.