Synthesis and Studies on some Heterocyclic Nitrogen Compounds

Chemistry Department, Aswan Faculty of Science, Aswan, Egypt Manuscript received 21 July 1968, revised 10 March 1989, accepted 12 April 1989 Condensation of 4,9 -dioxopiperldine[2,3-g]-1,2,3,4 6,7,8,9-octahydroquinolino­quinone (1) with aromatic aldehydes yielded the corresponding 3,3-bis-benzylidene derivatives (2a-f). Interaction of 2a—f with hydrazines, bydroxylamine, urea and thiourea afforded a new bis(pyrazolino-, 4a — f, 5a—f ; isoxazolino- 6a — f ; pyrimidine and/or pyrimidine-thione, 7a— f, 8a —f) derivatives, respectively