Keto-enol tautomerism is an important process in sugar biochemistry. The interconversion of an aldose to a ketose, such as D- glucose to D-fructose, occurs via their common enolate isomer.

Abstract Substituent, temperature and solvent effects on tautomeric equilibria in several β-ketoamides have been investigated by means of nuclear magnetic resonance spectroscopy (NMR). Keto-enol ...

The keto–enol tautomerism of hydroxypyridine-carboxylic acid (HPC) derivatives with proton transfer between the hydroxyl or carboxyl oxygen atoms was investigated in the case of three ...