Facile Regioselective Synthesis of Pyrano[3,2-c][1]benzo-thiapyran-5(2H)-one and 2-Methyl Furo[3,2-c][1] Benzothiapyran-4-one |
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| Authors: | K C Majumdar P K Choudhury A T Khan |
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| Institution: | Department of Chemistry , University of Kalyani Kalyani , 741235, W.B., INDIA |
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| Abstract: | The hitherto unreported title compounds were obtained in good yields by the application of 3,3]sigmatropic rearrangement on 4-]2′-propynyloxy] 1]benzothiapyran-2-one and 4-2′-propenyloxy]1]benzothiapyran-2-one or 4-2′-chloro-2′-propenyloxy]1]benzothiapyran-2-one respectively. |
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