There is described 2-amino-5,7-disubstituted-naphthyridine and 5,7-disubstituted-naphthyridin-2(1H)-one derivatives with bronchodilating and hypotensive properties prepared by the reaction of 2,6-diaminopyridine with an appropriate .beta.-diketone providing the 2-amino products. The 2-oxo analogs are prepared from the 2-amino products by treatment with nitrous acid.