A simple and efficient approach to the synthesis of highly functionalized fused benzochromenes |
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Authors: | Issa Yavari Mohammad Anary-AbbasinejadAbdolali Alizadeh Zinatossadat Hossaini |
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Institution: | Department of Chemistry, Tarbiat Modarres University, P.O. Box 14115-175 Tehran, Iran |
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Abstract: | Protonation of the reactive intermediates produced in the reaction between tert-butyl isocyanide and dimethyl acetylenedicarboxylate or dibenzoylacetylene, by 1-naphthol, 2-naphthol, 2,3-dihydroxynaphthalene, 2,7-dihydroxynaphthalene or 4-methyl-8-hydroxycoumarin leads to vinylnitrilium cations, which undergo carbon-centered Michael type addition with the conjugate base of the naphthols to produce highly functionalized benzochromenes. |
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Keywords: | benzochromene isocyanide acetylenic compounds addition reaction |
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