The literature related to 15N NMR studies of tautomerism is updated and discussed. The
15N NMR data show that the technique is applicable for both liquid and solid state (both …

A combined theoretical and experimental study revealed that the nature of the upfield
(shielding) protonation effect in 15N NMR originates in the change of the contribution of the …

Combined quantum mechanical and molecular mechanical (QM/MM) simulations of dopa
decarboxylase have been carried out to elucidate the factors that contribute to the tautomeric …

Pyridoxal 5′-phosphate (PLP) Schiff base, a versatile cofactor, exhibits a tautomeric
equilibrium that involves an intramolecular proton transfer between the N-protonated …

This chapter will consider most interesting and promising systems, where controlled shift in
the position of tautomeric equilibrium can be achieved in solution upon protonation or …

A simple and mild protocol towards the regioselective synthesis of 1-aryl/heteroaryl-1-(2-
methylimidazo [1, 2-a] pyridin-3-yl) methanones has been developed by one-pot …

A theoretical study at the B3LYP/6-311++ G (d, p) level has been carried out on 2, 2′-, 3,
3′-and 4, 4′-bipyridines, as well as on their monoprotonated and diprotonated forms. The …

The behavior of Schiff bases derived from 3-hydroxypyridin-4-carboxaldehyde and two N-
aminoheterocycles in acid media is described. 1H, 13C, 15N NMR chemical shifts establish …

Abstract Schiff bases of 3‐hydroxypyridin‐4‐carboxaldehyde and l‐α‐amino esters as well
as those derived from the structurally related amines lacking the ester function have been …

The effect of complexation with Lewis acids on the tautomeric equilibrium of a derivative of
pyridoxal has been explored using density functional theory. Three complexation sites …