Synthesis of novel crown ethers. Part 1. Coumestan and coumestan analog derivatives of crown ethers |
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Authors: | Mustafa Bulut Birsen Yilmaz Mehtap Yapici M. Vezir Kahraman |
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Affiliation: | (1) Faculty of Science and Art, Chemistry Department, University of Marmara, Kadíköy, 81040 Istanbul, Turkey |
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Abstract: | The presented ethylenedioxy compounds5a,5d,6a and6c are examples of novel cyclic ethers, while macrocyclic polyethers represent new crown ether analogues. New coumestan-crowns5a-f, derivatives of 6,7-dihydroxy-3,4-dihydro-2H-dibenzofuran-1-one and 6,7-dihydroxy-3,3-dimethyl-3,4-dihydro-2H-dibenzofuran-1-one6a-e were synthesized from the correspondingo-dihydroxy compounds3a-b,4a-b and ditosylates or dichlorides of di- or triethylene glycol in the presence of K2CO3, in DMF/H2O (15/1) solutions at 65–75 °C for 35 hours. The structure of the macrocyclic ethers obtained were confirmed by1H-NMR,13C-NMR, IR spectra and elemental analyses.Presented at the Sixth International Seminar on Inclusion Compounds, Istanbul, Turkey, 27–31 August, 1995. |
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Keywords: | Coumestan coumarin crown ethers |
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