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Efficient microwave-assisted synthesis of 3-benzothiazolo and 3-benzothiazolino coumarin derivatives catalyzed by heteropoly acids |
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| Authors: | M. Khoobi A. Ramazani A. R. Foroumadi H. Hamadi Z. Hojjati A. Shafiee |
| Affiliation: | 1. Chemistry Department, Zanjan University, P.O. Box 45195-313, Zanjan, Iran 2. Department of Medicinal Chemistry, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran, University of Medical Sciences, Tehran, 14176, Iran 3. Department of Chemistry, Chamran University, Ahvaz, 61357-4-3169, Iran |
| Abstract: | Heteropoly acids are reported as efficient catalysts for the microwave-assisted synthesis of 3-benzothiazolo and 3-benzothiazolino coumarin from o-aminothiophenol derivatives with 3-acetly and 3-cyanochromen-2-one in good to excellent isolated yields (73?C95%). This study suggests new techniques for the synthesis of chromene derivatives using an inexpensive and easily available catalyst, a simple procedure, short reaction time, and good to excellent yields of the products. |
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