Journal of Organic Chemistry p. 824 - 828 (1989)
Update date:2022-08-03
Topics:
Bergman, Jan
Pelcman, Benjamin
A synthesis of indolo<2,3-a>pyrrolo<3,4-c>carbazoles (16) based on a double Fisher indolization of the bis(phenylhydrazones) (10), employing polyphosphoric acid trimethylsilyl ester (PPSE) as the cyclization agent, is described.The bis(phenylhydrazones) (
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