Silicon-mediated highly efficient synthesis of 1, 8-dioxo-octahydroxanthenes and their transformation to novel functionalized pyrano-tetrazolo [1, 5-a] azepine derivatives |
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| Authors: | Hanan A. Soliman Tarek A. Salama |
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| Affiliation: | a Photochemistry Department, National Research Center, Dokki, Cairo 12622, Egypt;b Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt |
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| Abstract: | A facile and highly efficient protocol for the synthesis of 1,8-dioxo-octahydroxanthene derivatives was achieved through cascade Knoevenagel-Michael condensations and cyclo-dehydration reaction utilizing tetrachlorosilane (TCS) as catalyst under mild conditions. Reaction of the titled compounds with TCS-NaN3 to give novel functionalized pyrano[3,2-c]tetrazolo[1,5-a]azepine derivatives is also described. |
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| Keywords: | Tetrachlorosilane 1,8-Dioxo-octahydroxanthenes Synthesis Tetrazolo[1,5-a]azepines |
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