Tautomeric pyridines. Part XXIV. Tautomeric equilibria for 3-ethoxycarbonyl-, 3-ethoxycarbonyl-6,7-methylenedioxy-, and 3-cyano-4-quinolone
作者:Alan R. Katritzky、Joan Ellison、Judit Frank、Zoltán Mészáros
DOI:10.1002/recl.19811000108
日期:——
Ultraviolet spectra and pKa values for the title compounds and their O- and N-ethyl derivatives show that in each case the quinolone form is favoured in aqueous solution. The results are compared qualitatively with those for 4-quinolone and for findings in the gas phase.
标题化合物及其O-和N-乙基衍生物的紫外光谱和pK a值表明,在每种情况下,水溶液中均有利于喹诺酮形式。将结果与4-喹诺酮和气相发现的结果进行定性比较。