Abstract The syntheses of various oxidation states of the novel benzo [1, 2] cyclohepta [3, 4, 5-d, e]-isoquinoline ring system is described. The ring system was obtained by the Schmidt rearrangement, with exclusive alkyl migration, of 1, 6, 7, 11b-tetrahydro-2H-dibenz-[cd, h] azulen-2-one and by a Bischler-Napieralski reaction of suitable derivatives of 10, 11-dihydro- 5H-dibenzo [a, d] cycloheptene-5-methylamine. 4, 5, 10, 11-Tetramethoxy derivatives of ...
