Copper-catalyzed intramolecular hydroamination of allenylamines to 3-pyrrolines or 2-alkenylpyrrolidines

Copper salts, such as CuCl, CuI, Cucl2 and Cu(OTf)2, were used to catalyze the intermolecular hydroamination of allenylamines to provide the corresponding 3-pyrrolines or 2-alkenylpyrrolidines.