caa a22 4500 46905011X CHVBK 20180323132828.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF02974101 doi (NATIONALLICENCE)springer-10.1007/BF02974101 Synthesis and cycloaddition reactions of C-(2-Naphthoyl)-N-arylmethanohydrazonoylpyridinium bromides [Elektronische Daten] [Hamdi Hassaneen, Ahmad Shawali, Nehal Elwan, Nada Abounada, Mohammed Algharib] Coupling of naphthacylpyridinium bromide2 [1-(2-naphthyl) ethanone-2-pyridinium bromide] with N-nitrosoacetarylamides afforded C-(2-naphthoyl)-N-arylmetha-nohydrazonoylpyridinium bromides3A-C. Treatment of3A-C with base afforded the corresponding tetrazines6A-C. Cycloaddition of nitrilimines5A-C to N-arylmaleimides, acrylonitrile, ethyl acrylate, acrylamide, fumaronitrile, α-cyanocinnamonitriles, ethyl α-cyanop-nitrocinnamates and α-cyano-p-nitrocinnamamide afforded the corresponding cycloadducts7-14, respectively. The cycloadducts11-14 undergo a facile thermal elimination of hydrogen cyanide to give the corresponding pyrazoles18-21, respectively. The Pharmaceutical Society of Korea, 1992 2-Pyrazolines nationallicence tetrazines nationallicence 4-cyanopyrazoles nationallicence pyrrolo [3,4-C] pyrazol-4,6-dione nationallicence Hassaneen Hamdi Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut Shawali Ahmad Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut Elwan Nehal Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut Abounada Nada Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut Algharib Mohammed Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut Archives of Pharmacal Research Pharmaceutical Society of Korea 15/4(1992-12-01), 292-297 0253-6269 15:4<292 1992 15 12272 https://doi.org/10.1007/BF02974101 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02974101 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hassaneen Hamdi Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut NATIONALLICENCE 700 1- Shawali Ahmad Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut NATIONALLICENCE 700 1- Elwan Nehal Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut NATIONALLICENCE 700 1- Abounada Nada Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut NATIONALLICENCE 700 1- Algharib Mohammed Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt aut NATIONALLICENCE 773 0- Archives of Pharmacal Research Pharmaceutical Society of Korea 15/4(1992-12-01), 292-297 0253-6269 15:4<292 1992 15 12272 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer