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Fused Heterocycle-Naphthalene Systems from Thebaine, II
Fleischhacker, Wilhelm,Richter, Bernd
, p. 840 - 846 (1984)
The benzisoquinolines 2a and 2b were prepared by two ways from the tetrasubstituted naphthalene 1a.A second-order Beckmann rearrangement is described which leads to the salt 5, which is demetylated.A three-step procedure leads from 1a to the homologous naphthazepine 9.
