Polycyclic fused phenanthridines: An alternative approach from benzotriazoles
作者:Alan R. Katritzky、Weihong Du、Yasuhisa Matsukawa、Ion Ghiviriga、Sergey N. Denisenko
DOI:10.1002/jhet.5570360417
日期:1999.7
We describe an alternativeapproach to polycyclicphenanthridines (7) and some of their analogues using conditions much milder than those previously reported. The procedure includes the generation of a benzotriazole stabilized carbanion, oxidation of the resulting anion to a radical, and elimination of nitrogen followed by ring closure to produce phenanthridines.