M. Abass, Chemistry of substituted quinolinones. Part II synthesis of novel 4-pyrazolylquinolinone derivatives, SYN COMMUN, 30(15), 2000, pp. 2735-2757
4-Hydrazino-1-methyl-2(1H)quinolinone (2) was treated with chlorophthalazin
e, nitrous acid, isothiocyanates and isatines, and also utilized as a precu
rsor for some new 4-pyrazolylquinolinones. Reaction of 2 with certain 3-acy
lquinolinones afforded quinolinylpyrazoloquinolinones and/or quinolinyl-pyr
azolylquinolinones.