title: [Chemical and pharmaceutical research on pyran derivatives. XI. Synthesis of 2-dialkylamino-4-oxo-10-methyl-4H-naphtho[2,3b]pyrans].
abstract: Reaction of N,N-dialkylethoxycarbonylacetamides with 1-methyl-2-naphthol, in the presence of phosphorus oxychloride, gave rise to the formation of 2-dialkylamino-4-oxo-10-methyl-4H-naphtho[2,3-b] pyrans through the preliminary attack of the amide-phosphorus oxychloride reactant at the phenolic hydroxyl and cyclization at position 3 of the naphthalene moiety. However when (N-alkyl,N-phenyl)ethoxycarbonylacetamides were used in the reaction an ortho position of the N-phenyl group was involved in the cyclization and 1-alkyl-2(1'-methyl-2'-naphthoxy)-4-quinolones were achieved. Pharmacological investigation showed that some naphtho[2,3-b]pyran derivatives have neurotropic activity of the sedative, anticonvulsant and antidepressant type very similar to that shown by previously studied 1-oxo-3-dialkylamino-1H-naphtho[2,1-b]pyrans (5).
mesh_terms: D000661:Amphetamine / Q000037:antagonists & inhibitors; D000818:Animals; D000927:Anticonvulsants / Q000138:chemical synthesis; D001522:Behavior, Animal / Q000187:drug effects; D008297:Male; D008722:Methods; D051379:Mice; D009281:Naphthalenes / Q000138:chemical synthesis* / Q000494:pharmacology; D011619:Psychotropic Drugs / Q000138:chemical synthesis*; D011714:Pyrans / Q000138:chemical synthesis* / Q000494:pharmacology; D012110:Reserpine / Q000037:antagonists & inhibitors
chemical_list: D000927:Anticonvulsants; D009281:Naphthalenes; D011619:Psychotropic Drugs; D011714:Pyrans; D012110:Reserpine; D000661:Amphetamine
vernacular_title: Ricerche chimiche e farmacologiche su derivati piranici. Nota XI-Sintesi di 2-dialchilammino-4-oxo-10-metil-4H-nafto[2,3-b]pirani.