作者:A.R. Katritzky、F.W. Maine
DOI:10.1016/s0040-4020(01)93217-x
日期:1964.1
The IR, UV, and NMR spectra and pK values are discussed of six potentially tautomeric 1-phenyl and 1-methyl-pyrazolin-5-ones. These compounds exist under most conditions in non polar media in the Δ3-form. In aqueous solution that NH-formis in equilibrium with ca.10% of the OH-form. The effect of substituents, and the relation of the results to those for the corresponding isoxazolin-5-ones is discussed
讨论了六个潜在的互变异构的1-苯基和1-甲基-吡唑啉-5-酮的IR,UV和NMR光谱以及p K值。在Δ在非极性介质中在大多数情况下存在这些化合物3 -构型。在水溶液中,NH形式与OH形式的约10%处于平衡状态。讨论了取代基的作用以及结果与相应异恶唑啉-5-酮的关系。回顾以前的工作。