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            Silver(I)-catalyzed sequential hydroamination and Prins type cyclization for the synthesis of fused benzo-?-sultams

            An intramolecular annulation strategy has been developed for the synthesis of tetrahydrobenzo[e]pyrano[4,3-c][1,2]thiazine derivatives by means of coupling of aldehydes with 2-(4-hydroxybut-1-yn-1-yl)-N-arylsulfonamides using a catalytic amount of silver hexafluoroantimonate in toluene at 80 °C. This is the first r Synthetic methodology in OBC

            Authors:   B. Maheshwar Rao; J. S. Yadav; B. Sridhar; B. V. Subba Reddy
            Journal:   Organic & Biomolecular Chemistry
            DOI:   10.1039/C8OB00918J
            Facts, background information, dossiers
            • Cyclization
            • Annulation
            • aldehydes
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