4-hydroxy-naphthpyridine-2(1h)-one-3-carboxylic acids and...

Details 4-hydroxy-naphthpyridine-2(1h)-one-3-carboxylic acids and... 4-hydroxy-naphthpyridine-2(1h)-one-3-carboxylic acids and...

C - Chemistry, Metallurgy

07

D

260/282.5

C07D 221/08 (2006.01)

Patent

CA 1117527

4-HYDROXY-NAPHTHPYRIDINE-2(1H)- ONE-3-CARBOXYLIC ACIDS AND ESTERS Abstract of the Disclosure Anti-allergic 4-hydroxy-naphthpyridine-2(lH)-one- 3-carboxylic acids and esters are prepared by reacting a 1,3- dioxo-l-naphth[4,5-b]oxazine with an alkali metal salt of a malonic ester (and hydrolyzing to obtain the acids).

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