Preparation of quinophthalones

Details Preparation of quinophthalones Preparation of quinophthalones

1991-06-27

1992-04-21

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548473, 546173, C07D40302

Patent

active

051069806

ABSTRACT:
A process for the preparation of a quinophthalone of the formula ##STR1## in which X is hydrogen, chlorine or bromine and n is an integer from 1 to 4, by condensing 8-aminoquinaldine with a phthalic anhydride, optionally monosubstituted or polysubstituted by chlorine or bromine, in the presence of molten benzoic acid acting as diluent.

REFERENCES:
patent: 3662583 (1971-11-01), Dehnert
Chimia, vol. 24, (Sep. 1970), pp. 328-342.

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