H. Kotsuki et al., INTRAMOLECULAR DIELS-ALDER REACTION OF BENZYNES - A NOVEL STRATEGY FOR THE CONSTRUCTION OF TETRAHYDROBENZAZEPINE SKELETONS, Heterocycles, 38(1), 1994, pp. 31-34
Intramolecular Diels-Alder reaction of benzynes, generated from ortho-
haloaniline derivatives by the action of lithium 2,2,6,6-tetramethylpi
peridide, with furans has been developed as a novel route for the cons
truction of tetrahydrobenzazepine skeletons.