Patent ID: 8436211

Claim:
A process for the preparation of a substituted biphenyl of formula (I) in which X 1 and X 2 , independently of one another, are halogen atoms or linear or branched C 1-12 -alkyl groups; n is 0, 1 or 2; m is 1, 2, 3, 4 or 5; R 1 is selected from the group consisting of amino (NHR 2 ), nitro (NO 2 ), amide groups (R 2 —(CO)—NH—) and Schiff's bases (R 3 R 4 C═N—), R 2 , R 3 and R 4 , independently of one another, are linear or branched C 1-12 -alkyl groups or cyclic C 3-8 -alkyl groups, benzyl groups, benzoyl groups, prazolyl groups of formula (Ia), or pyridyl groups of formula (Ib) R 3 is a linear or branched C 1-12 -alkyl group or a C 1-6 -haloalkyl group having 1 to 6 halogen atoms, comprising reacting an aryl halide of formula (II) in which Hal is selected from the group consisting of bromine, chlorine and iodine; and R 1 , X 1 and n are as defined above, in the presence of a base and a palladium catalyst in a solvent, with a tetraarylborate of formula (III) in which X 2 and m are as defined above, and M q+ is a cation selected from the group consisting of ammonium (q=1), alkali metal (q=1) and alkaline earth metal (q=2).