作者:O. Keller、V. Prelog
DOI:10.1002/hlca.19710540822
日期:1971.12.10
The hitherto unknown tautomer of levulinic acid anilide (Ia), 5-hydroxy-5-methyl-1-phenyl-2-pyrrolidone (IIa), has been obtained by filtration of a chloroform solution of I a through acid ion-exchange columns. Ia and IIa show typical differences in NMR., IR. and MS. that can be used for their detection and determination in mixtures. Both tautomers are stable at room temperature in solid state and in
乙酰丙酸苯胺(Ia)的迄今未知的互变异构体,5-羟基-5-甲基-1-苯基-2-吡咯烷酮(IIa),是通过将Ia的氯仿溶液通过酸离子交换柱过滤而获得的。图1a和图1a显示了NMR,IR上的典型差异。和MS。可用于混合物中的检测和测定。两种互变异构体在室温下在固态和中性溶液中均稳定,但在酸性和碱性溶液中达到平衡。