N. Dekimpe et M. Boelens, ORGANOSELENIUM-INDUCED CYCLIZATION OF GAMMA,DELTA-ALKENIMINES TO NITROGEN-HETEROCYCLES, Journal of the Chemical Society, Chemical Communications, (11), 1993, pp. 916-918
Gamma,delta-alkenimines undergo electrophile-induced cyclization by me
ans of phenylselenenyl bromide to produce cyclic iminium salts which a
re reduced to functionalized pyrrolidines or piperidines.