Various non-aromatic heterocyclic compounds, including lactones, lactams, thiolactams, chromanones, and pyrrolines are obtained by reactions involving the intramolecular addition of carbon-centered ene radicals to carbon-carbon multiple bonds.
@ 1993 IUPAC
Bachi, Mario D., Anna Balanov, Nira Bar-Ner, Eric Bosch, Daniella Denenmark, and Michael Mizhiritskii. "Synthesis of non-aromatic heterocyclic compounds through free-radical reactions." Pure and applied chemistry 65, no. 4 (1993): 595-601.
Pure and Applied Chemistry