[EN] PROCESS FOR THE PREPARATION OF 3-HALOALKYLPYRAZOLES<br/>[FR] PROCÉDÉS DE PRÉPARATION D'HALOALKYLPYRAZOLES
                        
                            
                                申请人:SYNGENTA PARTICIPATIONS AG
                            
                            
                                公开号:WO2012019950A1
                            
                            
                                公开(公告)日:2012-02-16
                            
                            The present invention provides a process for the preparation of a compound of formula (I) wherein R1 is C1-C4 haloalkyl; R2 is optionally substituted alkyl, optionally substituted aryl or optionally substituted heteroaryl; and R3 is methyl or ethyl; comprising reacting a compound of formula (IV) wherein R1, R2 and R3 are as defined for the compound of formula I; with an alkylating agent in the presence of an amide.
                            本发明提供了一种制备式(I)化合物的过程,其中R1为C1-C4卤代烷基;R2为可选取代烷基、可选取代芳基或可选取代杂环基;R3为甲基或乙基;包括在酰胺存在下,将式(IV)化合物按照式(I)中所定义的R1、R2和R3反应与烷基化剂。