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Communication | Regular issue | Vol 20, No. 8, 1983, pp.1535-1539
Published online, 1st January, 1970
DOI: 10.3987/R-1983-08-1535
The Pyrolysis and Photolysis of the Protopine Type Alkaloid N-Oxides. The Synthesis of the Secoberbines and Benzo[c]phenanthridines

Kinuko Iwasa and Narao Takao

*Kobe Women’s College of Pharmacy, Motoyamakita, Higashinad, kobe, Hyogo 658, Japan


The pyrolysis of the N-oxides of the protopine-type alkaloids afforded three products, one of which was converted to the naturally occurring secoberbines. The photolysis of the N-oxides of the protopines supplied the benzo[c]phenanthridines as well as the one of the pyrolysis products.