OXIDATIVE COUPLING OF 4a,9-DIAZA-1,2,4a,9a-TETRAHYDROFLUORENES. 1. SYNTHESIS OF MONONUCLEAR HETEROCYCLIC QUINONEDIIMINES

Article abstract of DOI:10.1007/BF00481519

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 condit