Abstract
Oxidative coupling of 4a,9-diaza-1,2,4a,9a-tetrahydro-9H-fluorene with primary amines and ammonia in the presence of MnO2 gives the corresponding 6-aryl (or alkyl)imino-4a,9-diaza-1,2,4a,9a-tetrahydro-6H-fluorenes. Coupling with thiourea under these conditions affords 6-cyanoimino-4a,9-diaza-1,2,4a,9a-tetrahydro-6H-fluorenes.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1500–1504, November, 1989.
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Slabko, O.Y., Kaminskii, V.A. & Tilichenko, M.N. Oxidative coupling of 4a,9-diaza-1,2,4a,9a-tetrahydrofluorenes. 1. Synthesis of mononuclear heterocyclic quinonediimines. Chem Heterocycl Compd 25, 1254–1258 (1989). https://doi.org/10.1007/BF00481519
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DOI: https://doi.org/10.1007/BF00481519