2-amino-5-oxo-5h-¬1|benzopyrano¬2,3-b|pyridine-3- carboxylic...

Details 2-amino-5-oxo-5h-¬1|benzopyrano¬2,3-b|pyridine-3- carboxylic... 2-amino-5-oxo-5h-¬1|benzopyrano¬2,3-b|pyridine-3- carboxylic...

C - Chemistry, Metallurgy

07

D

167/231, 260/276

C07D 491/052 (2006.01) A61K 31/44 (2006.01) C07D 311/22 (2006.01) C07D 491/04 (2006.01)

Patent

CA 1290758

2-Amino-5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-3- carboxylic acid Derivatives and Their Production Abstract of the Disclosure The present invention relates to novel 2-amino- 5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-3-carboxylic acid derivatives useful for prophylaxis and therapy of allergic diseases such as allergic asthma, allergic dermatitis and hay fever, which have the following formula: Image wherein A is Image (R, R1 and R2 are independently hydrogen or lower alkyl and m is 0 or 1, with the proviso that when m is 1, R1 is hydrogen) or R-CO- (R has the same meaning as defined above), or a physiologically acceptable salt thereof, and to a method for preparing the same.

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