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Publikováno v:
Chemistry of Heterocyclic Compounds. 38:226-230
Oxidative coupling of 4α,9-diaza-1,2,4α,9α-tetrahydro-9H-fluorenes with o-aminophenol and o-aminothiophenol in the presence of MnO2 gives o-hydroxyphenyl- and o-mercaptophenylquinonediimines, cyclization of which gives derivatives of phenoxazine a