Synthèse et tautoméric d'amino-3 et d'hydroxy-3 buténolide

The synthesis fo 3-amino- and 3-hydroxy-2-methyl-4,4-spiro-cyclohexane-2-butene-4-olide was achieved starting from isocyanate or an isocyanate precursor. The study and discussion of tautomeric structures were peformed using ir and nmr spectra functional groups reactivity.