J. Boivin et al., A VERSATILE RADICAL-BASED SYNTHESIS OF GAMMA-LACTAMS USING NICKEL POWDER ACETIC-ACID, Tetrahedron letters, 35(31), 1994, pp. 5629-5632
A variety of gamma-lactams are obtained from suitable of alpha-haloami
des by a radical cyclisation mediated by a combination of nickel powde
r and acetic acid.