Über die Umsetzung von Δ1-Pyrrolinen mit aktivierten Alkinen

On the Reaction of Δ¹-Pyrrolines with Activated Alkynes Indolizines and their partially hydrogenated derivatives are usually synthesized by reacting 2-picolines with α-halogenated carbonyl compounds. In this paper a new synthetic approach is described: the reaction of 2-substituted Δ¹-pyrrolines with alkynyl-carbonyl compounds leading to tetrahydroindolizines and Δ¹-pyrrolinylalkynes.