SYNTHESIS OF 4-AZAFLUORENES SUBSTITUTED AT THE POSITION 9 BASED ON 9,9-DIPHENACYL(PHENACYLIDENE)-4-AZAFLUORENE

Article abstract of DOI:10.1007/BF00532030

Functionally substituted 4-azafluorenes were synthesized by the modification of the carbonyl groups of 9,9-diphenacyl-4-azafluorene.Tha usual reductive cleavage of 9,9-di(α-bromophenacyl)-4-azafluorene by hydrazine, leading to the formation of diphenylpyr