The synthesis of methano-bridged bisdehydro [18]-, -[20]-, -[22]-, and -[24] annulenes |
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| Affiliation: | 1. Dept. of Chemistry, Faculty of Scienae, Toyama University, Gofuku, Toyama 930, Japan;2. Dept. of Industrial Chemistry, Faculty of Engineering, Toyama University, Gofuku, Toyama 930, Japan;1. Department of Chemistry, Lovely Professional University, Phagwara, Jalandhar, Punjab, 144411, India;2. Department of Biotechnology, Lovely Professional University, Phagwara, Jalandhar, Punjab, 144411, India;3. Department of Chemistry, Faculty of Natural and Mathematics Science, University of Prishtina, 10000, Prishtina, Republic of Kosovo;4. Materials Science-Nanochemistry Research Group, Nano Alb-Unit of Albanian Nanoscience and Nanotechnology, 1000, Tirana, Albania;5. Department of Process Engineering, Height School of Technology, Sidi Mohammed Ben Abdallah University, P.O. Box 2427, 30000, Fez, Morocco;6. Bharat oil and waste management limited Roorkee, Utrakhand-247664, India;7. Nanotechnology and Water Sustainability Research Unit, College of Science, Engineering and Technology, University of South Africa, Johannesburg 1709, South Africa;1. Department of Inorganic and Bioinorganic Chemistry, Universidad Complutense de Madrid, Hospital 12 de Octubre, Spain;2. CIBER-BBN, Spain;3. Department of Neurosciences, City of Hope, Beckman Research Institute, Duarte, CA, USA;4. Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, USA;1. College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, PR China;2. Key Laboratory of New Energy & New Functional Materials, College of Chemistry and Chemical Engineering, Yan’an University, Yan’an, Shaanxi 716000, PR China;3. College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, PR China;1. National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia;2. Institute for the Study of Nanostructured Materials, National Research Council (ISMN-CNR), Via Salaria km 29,300, 00015 Monterotondo (RM), Italy;3. Institute for Polymers, Composites and Biomaterials, National Research Council of Italy (IPCB-CNR), P.le E. Fermi 1, 80055 Portici, Italy;4. Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy |
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| Abstract: | Title annulenes were synthesized by Wittig reaction of cyclohepta-1,3,5-triene-1,6-dialdehyde or its vinylogous dialdehydes with 5-methylpenten-2-yn-4-yltriphenylphosphonium bromide, followed by intramolecular oxidative couplings of the resulting acyclic compounds, and they proved to be diatropic or paratropic, corresponding to the number of peripheral π-electrons. |
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