ChemInform Abstract: Thermal Intramolecular Reactions of δ1‐1,2,4‐Triazolines with Extended Exocyclic Unsaturation.

Abstract

The triazolines (I) and (III) undergo thermal first‐order transformations to afford the rearranged pyrrole (IIa) (and its hydrolysis product (IIb); an unknown compound, probably an isomer of (IIb), is obtained in 9% yield) and the deazotized enaminoamide (IV), respectively, the latter in solvent‐dependent yields (in MeOH aniline and tBu‐NH‐CH=CH‐E are coproducts).