申请人:Smidt Sebastian Peer
公开号:US20110105766A1
公开(公告)日:2011-05-05
A process for preparing substituted biphenyls of the formula I
where R
1
=nitro or amino,
R
2
=cyano, halogen, C
1
-C
4
-haloalkyl, C
1
-C
4
-haloalkoxy or C
1
-C
4
-haloalkylthio,
n=from 0 to 3, and R
3
=hydrogen, cyano or halogen,
which comprises reacting a halobenzene of the formula II
in which Hal is chlorine or bromine,
in the presence of a base and of a palladium catalyst which consists of palladium and a bidentate phosphorus ligand of the formula III
where Ar is phenyl which is substituted if desired and R
4
and R
5
are each C
1
-C
8
-alkyl or C
3
-C
6
-cycloalkyl or together form a 2- to 7-membered bridge which may, if desired, bear a C
1
-C
6
-alkyl substituent,
in a solvent or diluent, with a phenylboronic acid IVa
a diphenylborinic acid IVb
or a mixture of IVa and IVb.
一种制备式I的取代联苯的方法,其中R1=硝基或氨基,R2=氰基、卤素、C1-C4卤代烷基、C1-C4卤代氧烷基或C1-C4卤代硫代烷基,n=从0到3,R3=氢、氰基或卤素,包括在存在碱和钯催化剂的条件下,所述钯催化剂由钯和式III的双齿膦配体组成,其中Ar是苯基,如有需要可被取代,R4和R5各自为C1-C8烷基或C3-C6环烷基,或者共同形成一个2到7成员的桥,如有需要,该桥上可能带有一个C1-C6烷基取代基,在溶剂或稀释剂中,与苯硼酸IV、二苯硼酸IV或IVa和IVb的混合物反应的方法。