Process for preparing diketones

Details Process for preparing diketones Process for preparing diketones

1990-07-23

1994-08-16

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562426, 562429, 562460, 562459, 562461, 562466, 562467, 562473, C07C 5976

Patent

active

053388810

ABSTRACT:
This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic acid and a phosphorus pentoxide. The diketones and keto-acids can be used to prepare polyketones which are useful as molding plastics, coatings, films, fibers, and the like.

REFERENCES:
patent: 3767620 (1973-10-01), Angelo et al.
patent: 4453010 (1984-06-01), Staniland
patent: 4611033 (1986-09-01), Maresca
patent: 4816556 (1989-03-01), Gay et al.
M. Ueda et al., Makromol., 20, pp. 2675-2678 (1987).
M. Ueda et al., Makromol. Chem., Rapid Commun., 5, pp. 833-836 (1985).
UEDA, Metal Macromolecules 20(11) 2675-8 1987.

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