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Paper | Regular issue | Vol 45, No. 11, 1997, pp.2209-2216
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7955
Synthesis of 6-, 7-, 8-, or 9-Substituted 1H-Pyrano[4,3-b]quinoline Derivatives by the Cyclization of 3-Acetyl-4-arylamino-2H-pyran-2-one Derivatives

Atsuko Sato, Mieko Morone, and Yutaka Azuma*

*Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan


Heating of 3-acetyl-4-arylamino-6-methyl-2H-pyran-2-one derivatives in concd H2SO4 gave 6-, 7-, 8- or 9-substituted 6,10-dimethyl-1H-pyrano[4,3-b]quinoline derivatives.