Solution and solid state (CPMAS) NMR studies of the tautomerism of six-membered heterocyclic compounds related to 2-pyridones

[摘要] Several13C and15N chemical shifts of 2-pyridone(1), 4(3H)-pyrimidone(2), uracil(3)and cytosine(4)have been measured in solution and in the solid state. These data have been discussed in relation with the tautomerism of the four heterocycles. GIAOab initiocalculations of absolute shieldings have been carried out to identify the predominant tautomers in the case of compounds(1)and(2).

[学科分类] 光谱学