Electrochemical cyclization of 1-phenyl-2(-1′chlorophenyl)-substituted five-membered nitrogen heterocycles. Application to the synthesis of phenanthridines
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 11,p. 2995-2998
- https://doi.org/10.1039/p19900002995
Abstract
Pyrrolo[1,2-f]phenanthridine (compound 4), 3-phenylimidazo[1,2-f]phenanthridine 8, tetrazolo[1,5-f]phenanthridine 11 and benzo[c]tetrazolo[1,5-f]phenanthridine 12 have been prepared using an electrochemical cyclization procedure. Treatment of the imidazophenanthridine with singlet oxygen yields a phenanthridone by degradation of the heterocyclic system. Lithium aluminium hydride reduction of the tetrazolophenanthridines yields the phenanthridine.Keywords
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