JOURNAL OF HETEROCYCLIC CHEMISTRY, vol.44, no.3, pp.539-541, 2007 (SCI-Expanded)
A short synthesis of the hexahydropyrido[4,3-b]carbazole derivative 8 which is important for the preparation of aspidosperma alkaloids was described. Construction of the tetracyclic structure was achieved via a short synthetic route and some new carbazolone derivatives (4, 5, 6 and 7) were synthesized.