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The title C-pentagalactoside featuring β-(1->6) ethylene bridges between the d-galactopyranose units has been prepared through four consecutive cycles comprising the Wittig reaction of a formyl C-galactoside building block with sugar phosphorane substrate followed by the introduction of a methylphosphonium group at the nonreducing end; the target product was obtained by hydrogenolysis of the tetraene...
A new entry to (1->6)- and (1->5)-aza-C-disaccharides featuring the pyrrolidine ring as the imino sugar component is described via Wittig condensation of polyhydroxylated 2-formylpyrrolidines with galactopyranose 6-phosphorane and ribofuranose 5-phosphorane, respectively.
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