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Communication | Regular issue | Vol 22, No. 11, 1984, pp.2513-2516
Published online, 1st January, 1970
DOI: 10.3987/R-1984-11-2513
New Condensed Tri- and Tetracyclic Pyrazole Ring System

Jan Svetlík*

*Drug Research Institute, Palárikova 31, 811 04 Bratislava, Slovakia


1 -Phenylpyrazolo[4,3-e]pyrrole[1,2]pyracolo[1,2-a]pyrazine and its 5-aza analogue were synthesized from ethyl 5-amino-1-phenylpyrazole-4-carboxylate. Additional azole ring amelations onthe pyrazine part of the first heterocycle afforded new tetracyclic systems with two common nitrogen atoms,