Multisulfonate hyperbranched polyglycerol functionalized graphene oxide as an efficient reusable catalyst for green synthesis of benzo[a]pyrano-[2,3-c]phenazines under solvent-free conditions |
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| Authors: | Hossein Naeimi Maryam Farahnak Zarabi |
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| Institution: | Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan 87317 Islamic Republic of Iran, Fax: +98-03155912397, +98-03155912388 |
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| Abstract: | A novel acid catalyst was prepared based on growing hyperbranched polyglycerol (HPG) on the surface of graphene oxide. Then, the hydroxyl groups of HPG on graphene oxide were functionalized by sulfonate groups to form an acid catalyst. The catalyst displayed a good loading level of acidic groups on the surface because of coating graphene oxide with HPG. This new catalyst is demonstrated to be highly effective in the preparation of benzoa]pyrano2,3-c]phenazine dyes.A novel acid catalyst was prepared based on growing hyperbranched polyglycerol (HPG) on the surface of graphene oxide. Then, the hydroxyl groups of HPG on graphene oxide were functionalized by sulfonate groups to form an acid catalyst. |
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