Process for the production of diaryls

Details Process for the production of diaryls Process for the production of diaryls

C - Chemistry, Metallurgy

07

C

C07C 25/18 (2006.01) C07B 37/04 (2006.01) C07C 1/26 (2006.01) C07C 15/14 (2006.01) C07C 17/26 (2006.01) C07C 41/30 (2006.01) C07C 43/20 (2006.01) C07C 45/72 (2006.01) C07C 49/782 (2006.01) C07C 315/04 (2006.01) C07C 317/32 (2006.01)

Patent

CA 2094802

- 14 - HOE 90/F 322 Abstract Process for the preparation of biaryls Process for the preparation of biaryls of the formula (1) R1m - Ar - Ar - R1m (1) wherein Ar is a phenylene or naphthylene radical, R1 is a hydrogen, fluorine or chlorine atom or an unbranched or branched alkyl(C1-C6)-, alkyl(C1-C6)-O-, alkyl(C1-C6)-CO- or alkyl(C1-C6)-SO2H radical and m is the number of still unsubstituted =C- positions on the Ar radical, in which a compound of the formula (2) R1m - Ar - X (2) wherein Ar, R1 and m have the meanings cited above and X is a chlorine or bromine atom, is dehalogenated and dimerized in the presence of a palladium catalyst on a support material, of a reducing agent, a hydrogen halide acceptor, a polyether or polyether mixture and of water at temperatures of about 50 to about 120°C.

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