Évolution thermique et photochimique des triazolines résultant de l'addition des diazocomposés aux esters d'oximino-malonodinitriles, oximino-cyanoacétates et oximino-malonates de méthyle

Thermolysis of 1,2,3-triazolines 4, 5, 6 leads to the corresponding aziridines only when X = Y = CO2Me, and then with a very low yield. However, photolysis or evolution in the presence of trifluoroacetic acid gives good results when carried out at sufficiently low temperature. The thermolysis study of 4–6 shows a new route to 1,2,3-triazoline decomposition that has not yet been mentioned in the literature. The easy elimination of the paratoluenesulfonate or benzoate group explains this particular behaviour.