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Synthesis of indenoindoles on the basis of 2-aminofluorene and 2-aminofluorenone

Research paper by E. P. Frolova, R. N. Akhvlediani, N. N. Suvorov

Indexed on: 01 Oct '82Published on: 01 Oct '82Published in: Chemistry of Heterocyclic Compounds



Abstract

Ethyl esters of 2-carboxylic acids of 3H,10H-indeno[2,1-e]-1H,9H-indeno[1,2-f]indoles and their keto derivatives were obtained on the basis of 2-aminofluorene and its 9-keto derivative via the Japp-Klingemann and Fischer reactions. Saponification with subsequent decarboxylation of these products leads to unsubstituted cyclic systems and their keto derivatives.