申请人:BASF SE
公开号:US20130131352A1
公开(公告)日:2013-05-23
The present invention to a process for preparing 1-phenylpyrazoles of the formula I
5
in which each R
1
is independently selected from chlorine, fluorine, alkyl, haloalkyl, alkoxy and haloalkoxy; n is 1, 2 or 3; each R
2
is independently selected from cyano, nitro, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio and alkoxycarbonyl; m is 0, 1 or 2; A is alkyl, aryl or aryl-C
1
-C
4
-alkyl, where A optionally bears 1, 2, 3 or 4 substituents
comprising reacting a phenyl halide of the formula (II) with a pyrazole derivative of the formula (III)
in which
X is chlorine, iodine or bromine; and
R
1
, n, R
2
, m and A are each as defined above, in the presence of a base and a catalytic system comprising a ligand and a metal compound selected from palladium compounds, iron compounds and copper compounds.
本发明涉及一种制备式I5中的1-苯基吡唑的方法,其中每个R1独立选择自氯、氟、烷基、卤代烷基、烷氧基和卤代烷氧基;n为1、2或3;每个R2独立选择自氰基、硝基、卤素、烷基、卤代烷基、烷氧基、卤代烷氧基、烷基硫基和烷氧羰基;m为0、1或2;A为烷基、芳基或芳基-C1-C4-烷基,其中A可以带有1、2、3或4个取代基,包括反应式(II)的苯基卤化物与式(III)的吡唑衍生物,其中X为氯、碘或溴;并在碱和配体和从钯化合物、铁化合物和铜化合物中选择的金属化合物催化系统的存在下进行反应,其中R1、n、R2、m和A如上所定义。