Several compounds claimed to be 2-aryl-3-acetyl-4(1H)-quinolones (III) in the literature have been reformulated as the isomeric VI. The conversion of 2-phenyl-3-acetyl-4-chloroquinoline to 6-phenyl-7-methyldibenzo-[b,h][1,6]naphthyridine (X) and to 2,4-diphenyl-3-methyl-2H-pyrazolo[4,3-c]quinoune (XI) is described. β-Methylamino-α-(N-arylimidoyl)crotonic esters (II, R = CH 3) were thermally cyclized to 2-aryl-3-N-methylacetimidoyl-4(1H)-quinolones (V, R = CH 3).
|Number of pages||5|
|Journal||Journal of Organic Chemistry|
|Publication status||Published - 1965|