Preparation of 2,3,3′,4′...

Details Preparation of 2,3,3′,4′... Preparation of 2,3,3′,4′...

2007-09-18

2007-09-18

Oh, Taylor Victor (Department: 1625)

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

Organic compounds

Carboxylic acid esters

C560S096000

Reexamination Certificate

active

10971132

ABSTRACT:
2,3,3′,4′-Biphenyltetracarboxylic acid tetraester is predominantly produced by a process in which a phthalic acid diester is subjected to oxidative-coupling reaction in the presence of molecular oxygen and a catalyst comprising a rhodium-containing compound.

REFERENCES:
patent: 4008266 (1977-02-01), Intille
patent: 4581469 (1986-04-01), Itatani et al.

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