title: [Chemical and pharmacological research on pyran derivatives. VI. 2-Dialkylamino-4-oxo-4H-naphto/1,2-b/pyrans and derivatives].
abstract: The 2-dialkylamino-4-oxo-4H-naphtho [1,2-b]pyrans are obtained by the reaction of N,N-dialkylethoxycarbonylacetamides with alpha-naphthol and with substituted alpha-naphthols. The products on treatment with formaldehyde and morpholine or piperidine or N-methylpiperazine are transformed into the 2-dialkylamino-3-dialkylaminomethyl-4-oxo-4H-naphtho [1,2-b]pyrans. Pharmacological investigation has shown that 2-dimethylamino (K 12164), 2-(N-ethyl, N-methyl)amino- (K 12087) and 2-diethylamino-4-oxox-4H-naphtho [1,2-b]pyran (K 12165) show clear neurotropic activity of the neuroleptic type whereas compounds of the isomeric series, 1H-naphtho-[2,1-b]pyrans, studied previously (1), show anticonvulsive and sedative activity. This difference in pharmacological activity has prompted a more complete comparative examination of the activity of the two series of compounds. Study of antagonism to the effects of reserpine by both 4H-naphtho [1,2-b]pyrans and 1H-naphtho [2,1-b]pyrans has shown that in the latter series the 1-oxo-3-dimethylamino- (K 8291), the 1-oxo-3-(N-ethyl, N-methyl)amino- (K 8409) and the 1-oxo-3-diethylamino-1H-naphtho [2,1-b]-pyran (K 8292) have marked neurotropic activity of the antidepressive type.
mesh_terms: D000928:Antidepressive Agents / Q000138:chemical synthesis; D009281:Naphthalenes / Q000138:chemical synthesis*; D011714:Pyrans / Q000138:chemical synthesis*; D012110:Reserpine / Q000037:antagonists & inhibitors; D014149:Tranquilizing Agents / Q000138:chemical synthesis*
chemical_list: D000928:Antidepressive Agents; D009281:Naphthalenes; D011714:Pyrans; D014149:Tranquilizing Agents; D012110:Reserpine
vernacular_title: Ricerche chimiche e farmacologiche su derivati piranici. Nota VI-2-dialchilammino-4-oxo-4H-nafto [1,2-b] pirani e derivati