Method for producing biphenyl and its derivatives

Details Method for producing biphenyl and its derivatives Method for producing biphenyl and its derivatives

2005-07-05

2005-07-05

Tsang, Cecilia J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C544S225000, C546S002000, C585S422000

Reexamination Certificate

active

06914152

ABSTRACT:
A method for producing biphenyl and its derivative comprising oxidatively coupling a benzene aromatic compound in the presence of a catalyst comprising a palladium salt, a copper salt, and a bidentate ligand compound capable of forming a complex with the palladium salt via the nitrogen atom and the oxygen atom in the molecule thereof in an atmosphere containing molecular oxygen. In particular, an improved method for selectively producing an asymmetrically substituted biphenyl derivative, such as a 2,3,3′,4′-biphenyltetracarboxylic acid tetraester, which comprises oxidatively coupling a substituted aromatic compound, such as a phthalic diester, in the presence of the catalyst in an atmosphere containing molecular oxygen without replenishing with a ligand.

REFERENCES:
patent: 4581469 (1986-04-01), Itatani et al.
patent: 55-141417 (1980-11-01), None
patent: 60051150 (1985-03-01), None
patent: 60051151 (1985-03-01), None
patent: 61-106541 (1986-05-01), None
Jerry March, Advanced Organic Chem. 2nd. ed. McGraw-Hill Book Co. p. 463-469, 1979.

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