METHOD OF PREPARING ALKALINE METAL SALTS OF 2-PYRIDYL-OR 2-PYRIDIMYLAMINOBENZOIC ACID DERIVATIVES

Compounds of the formula wherein A is =CH- or =N-; R1 is (a) hydrogen, lower alkyl, lower alkoxy or a fused benzene ring, or (b) -CO-R4, tetrazol-5-yl or cyano in the 4- or 5-position; R2 is -CO-R4, tetrazol-5-yl, cyano or, when R1 has one of the meanings included in (b), also hydrogen, lower alkyl,...

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Bibliographische Detailangaben
Hauptverfasser:	ERNST-OTTO RENT,DE, ANTON MENTRUP,DE, KURT SHROMM,DE, ARMIN FYUGNER,DE, FOLKER YAKOBI,DE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY HETEROCYCLIC COMPOUNDS HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC CHEMISTRY PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
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Beschreibung
Zusammenfassung:	Compounds of the formula wherein A is =CH- or =N-; R1 is (a) hydrogen, lower alkyl, lower alkoxy or a fused benzene ring, or (b) -CO-R4, tetrazol-5-yl or cyano in the 4- or 5-position; R2 is -CO-R4, tetrazol-5-yl, cyano or, when R1 has one of the meanings included in (b), also hydrogen, lower alkyl, lower alkoxy or a fused benzene ring; R3 is hydrogen or lower alkanoyl; and R4 is hydroxyl, amino, hydroxy-amino, tetrazol-5-yl-amino or lower alkoxy; internal salts thereof, and non-toxic salts thereof formed with a basic substance. The compounds as well as their salts are useful as antiallergics.