The paper describes syntheses of 4,9-dihydro-3-methyl-4-oxo-1H(2H)-pyrazolo[3,4-b]quinoline (Ia), its 1-methyl derivative (Ib), 2-methyl derivative (IIa), 9-methyl derivative (Ic), 1,9-dimethyl derivative (Id) and 2,9-dimethyl derivative (IIb). Sodium salts of compounds Ia, Ib, Ic and IIa were methylated with methyl iodide in dimethylformamide at room temperature, compounds Id and IIb were demethylated with pyridine hydrochloride. The compounds prepared were tested for antiviral activity in vivo in mice against influenza virus A2-Hongkong and the Encephalomyocarditis virus.
这篇论文描述了4,9-二氢-3-甲基-4-氧代-1H(2H)-吡唑并[3,4-b]喹啉(Ia)、它的1-甲基衍生物(Ib)、2-甲基衍生物(IIa)、9-甲基衍生物(Ic)、1,9-二甲基衍生物(Id)和2,9-二甲基衍生物(IIb)的合成方法。化合物Ia、Ib、Ic和IIa的钠盐在室温下用碘甲烷在二甲基甲酰胺中甲基化,化合物Id和IIb则用盐酸吡啶脱甲基。制备的化合物在小鼠体内针对甲型流感病毒A2-香港和脑心肌病毒进行了抗病毒活性测试。