Cyclization of 3-Cyclopent-2-Enyl-4-Hydroxy[1]Benzopyran-2-One |
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| Authors: | K C Majumdar P Biswas P K Choudhury |
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| Institution: | 1. Department of Chemistry , University of Kalyani , Kalyani, 741 235, West Bengal, India;2. Department of Chemistry , University of Kalyani , Kalyani, 741 235, West Bengal, India;3. Department of Chemistry , Chakdaha College , W. B., India |
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| Abstract: | Cyclization of 3-cyclopent-2-enyl-4-hydroxy1]benzopyran-2-one (1) with cold cone. sulfuric acid gave a mixture of two products, 2 (10%) and 3 (80%). However, on treatment with mercuric chloride 1 furnished the linear product 4 in 60% yield while with mercuric acetate the bicyclic product 8 was obtained in 50% yield. The structures of products are established by chemical correlation. |
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