title: 2,3-Disubstituted 1,8-naphthyridines as potential diuretic agents. 2. 5,7-Dimethyl derivatives.
abstract: A variety of 2,3-disubstituted 5,7-dimethyl-1,8-naphthyridines was synthesized and tested in saline-loaded rats for their diuretic properties. The 2-amino-3-carbomethoxy and four 2-amino-3-N-alkylcarbamoyl compounds exhibited significant activity as measured by volume output; however, they were generally less potent than the corresponding 5,7-unsubstituted naphthyridines previously reported. Further screening without saline-loading indicated that the amides lacked kaliuretic properties; while, interestingly, the ester lacked an effect on either urine volume or sodium excretion.
mesh_terms: D000818:Animals; D004232:Diuretics / Q000138:chemical synthesis*; D009287:Naphthyridines / Q000138:chemical synthesis* / Q000494:pharmacology; D011188:Potassium / Q000652:urine; D051381:Rats; D012964:Sodium / Q000652:urine; D013329:Structure-Activity Relationship
chemical_list: D004232:Diuretics; D009287:Naphthyridines; D012964:Sodium; D011188:Potassium