Flash photolytic generation and study of the enol of 2-hydroxy-2-cyano-N-methylacetamide in aqueous solution, leading to an empirically-based estimate of the keto-enol equilibrium constant for the parent unsubstituted acetamide in that medium
J Am Chem Soc. 2001 Mar 21;123(11):2681-2.
doi: 10.1021/ja0036763.