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Paper | Regular issue | Vol 27, No. 12, 1988, pp.2857-2862
Published online, 1st January, 1970
DOI: 10.3987/COM-88-4723
A One Step Synthesis of 4-Cyanopyrazoles

Hamdi M. Hassaneen,* Hamed A. Ead, Nehal M. Elwan, and Ahmed S. Shawail

*Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt

Abstract

Reaction of nitrilimines 2 with fumaronitrile 6 yielded 4-cyanopyrazoles 8 in good yields. The structures of 8 were substantiated by comparison with their regioisomers 5-cyanopyrazoles 5, prepared by addition of 2 to acrylonitrile followed by oxidation of the 2-pyrazoline cycloadducts 4.