[EN] PROCEDURE FOR THE DECARBOXYLATION OF 3,5-BIS(HALOALKYL)-PYRAZOLE-4-CARBOXYLIC ACID DERIVATIVES<br/>[FR] PROCÉDURE DE DÉCARBOXYLATION DE DÉRIVÉS D'ACIDE 3,5-BIS(HALOALKYL)-PYRAZOLE-4-CARBOXYLIQUE
申请人:BAYER CROPSCIENCE AG
公开号:WO2014033164A1
公开(公告)日:2014-03-06
A new process for the preparation of 3,5-bis(haloalkyl)-pyrazole derivatives of the general formula (I), is described, resulting from the reaction of 3,5-bis(haloalkyl)-pyrazole-4-carboxylic acid derivatives of the general formula (IIa) with a copper compound and a base at elevated temperature wherein R1 is selected from H, C1-12-alkyl, C3-8-cycloalkyl, C6-18-aryl, C7-19-arylalkyl or C7-19-alkylaryl, CH2CN, CH2CX3, CH2COOH, CH2COO(C1-12)-alkyl, and X is independently of each other F, Cl, Br, I; R2 and R3 are selected independently of each other from C1-C6-haloalkyl.
介绍了一种新的制备通式为(I)的3,5-双(卤代烷基)-吡唑衍生物的方法,其结果是将通式为(IIa)的3,5-双(卤代烷基)-吡唑-4-羧酸衍生物与铜化合物和碱在高温下反应,其中R1从H,C1-12-烷基,C3-8-环烷基,C6-18-芳基,C7-19-芳基烷基或C7-19-烷基芳基,CH2CN,CH2CX3,CH2COOH,CH2COO(C1-12)-烷基中选择,而X独立地为F、Cl、Br、I;R2和R3独立地从C1-C6卤代烷基中选择。