Em. Campi et al., SYNTHESIS OF SUBSTITUTED ALPHA-METHYLENE LACTAMS BY RHODIUM-CATALYZEDCARBONYLATION OF ACETYLENIC AMINES, Tetrahedron, 50(8), 1994, pp. 2533-2542
Reactions of gamma- and beta-aminoalkynes, (2) and (5) with hydrogen a
nd carbon monoxide in the presence of rhodium catalysts give substitut
ed alpha-methylene-2-piperidinones (7) and 2-pyrrolidinones (11).