Facile, efficient, and eco-friendly synt
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Hassan Valizadeh; Ashraf Fakhari
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Article
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2009
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Journal of Heterocyclic Chemistry
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English
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## Abstract magnified image Room temperature synthesis of benzo[b]pyranβ2βimine derivatives __via__ the Knoevenagel condensation of malononitrile and cyanoacetates with salicylaldehyde derivatives over MgO and their transformation to the known coumarins is described. The satisfactory results were o