Computational Studies on Intramolecular Cycloadditions of Azidoenynes and Azidobutenenitriles to Give 6H-Pyrrolo[1,2-c][1,2,3]triazoles and 5H-Pyrrolo[1,2-d]tetrazoles
Cycloaddition of sulfonyl azides and cyanogen azide to enamines. Quantum-chemical calculations concerning the spontaneous rearrangement of the adduct into ring-contracted amidines
