Claisen rearrangement and cyclization of N-alkenyl-1,2,3,4-tetrahydroquinolines

1.	Claisen rearrangement of N-alkenyl- and N-cycloalkenyltetrahydroquinolines by treatment with Lewis and Bronsted acids affords 8-alkenyl- and 8-cycloalkenyltetrahydroquinolines in yields of up to 85%.
2.	Cyclization of the compounds obtained by treatment with polyphosphoric acid, palladium complexes, or UV irradiation has given some tri- and tetracyclic compounds.

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1852–1857, August, 1988.