1-Azaxanthone-3-carboxylic acids

Details 1-Azaxanthone-3-carboxylic acids 1-Azaxanthone-3-carboxylic acids

1978-02-27

1979-03-06

Raymond, Richard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

424256, 546 92, C07D49104

Patent

active

041430425

ABSTRACT:
The present invention relates to novel 1-azaxanthone-3-carboxylic acid and its derivatives usable for effective medicines for the treatment of allergic diseases, which are shown by the following formula (I) ##STR1## wherein R.sub.1 is hydrogen, alkyl, phenyl, carboxyl, hydroxyl, alkoxy or amino group which may be unsubstituted or substituted by one alkyl, m is 0, 1 or 2 and R.sub.2 is alkyl, alkoxy, halogen, nitro, hydroxy, carboxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl, and their physiologically acceptable salts.

REFERENCES:
patent: 3931205 (1976-01-01), Nakanishi et al.
patent: 4066655 (1978-01-01), Connor et al.
Petersen et al., Liebigs Ann. Chem., (1976), pp. 1659-1662.

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