[EN] PROCESS FOR THE PREPARATION OF PHENYL SUBSTITUTED 3 - DIFLUOROMETHYL - 1 -METHYL - 1H - PYRAZOLE - 4 - CARBOXYLIC N-METHOXY- [1 -METHYL- 2 - PHENYLETHYL] AMIDES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE N-MÉTHOXY-[1-MÉTHYL-2-PHÉNYLÉTHYL]AMIDES DE L'ACIDE 3-DIFLUOROMÉTHYL-1-MÉTHYL-1H-PYRAZOLE-4-CARBOXYLIQUE SUBSTITUÉS SUR PHÉNYLE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2013127764A1
公开(公告)日:2013-09-06
The invention relates to a process for the preparation of a compound of formula (I), wherein R1, R2 and R3 are as defined in claim 1, which process comprises a) adding a compound of formula (II), in the presence of an inert organic solvent to a mixture comprising an organic nitrite of formula (III) (R4-O-N=O (III)), wherein R4 is C1-C8alkyl, a compound of formula (IV), and an inert organic solvent; b) reacting the resulting compound of formula (V), with H2N-O-CH3 to the compound of formula (VII), c) reducing the compound of formula (VII) to the compound of formula (VIII), d) and reacting the compound of formula VIII with a compound of formula (IX), in which R* is halogen, hydroxy or C1-6 alkoxy, to the compound of formula (I).
本发明涉及一种制备公式(I)化合物的方法,其中R1、R2和R3如权利要求1中定义,该方法包括:a)在存在惰性有机溶剂的情况下,向包含公式(III)有机亚硝酸盐(R4-O-N=O(III))的混合物中加入公式(II)化合物,其中R4为C1-C8烷基,公式(IV)化合物和惰性有机溶剂;b)将得到的公式(V)化合物与H2N-O-CH3反应得到公式(VII)化合物;c)将公式(VII)化合物还原为公式(VIII)化合物;d)将公式(VIII)化合物与公式(IX)化合物反应,其中R*为卤素,羟基或C1-6烷氧基,得到公式(I)化合物。