Abstract
The 5-O-(2,6-diamino-2,6-dideoxy-α-d-glucopyranosyl)-2-deoxystreptamine derivative and its related compounds were synthesized by a modified Konigs-Knorr condensation of 3,4-di-O-acetyl-2,6-dideoxy-2-(2′,4′-dinitroanilino)-6-phthalimido-α-d-glucopyranosyl bromide (I) with 4,6-di-O-acetyl-N,N′-dicarbobenzoxy-2-deoxystreptamine (V) and the corresponding streptamine (XI). The aglycons (V) and (XI) were prepared by selective acetylation of the aminocyclitol derivatives by taking advantage of the reactivity difference between the hydroxyl groups at C5 and C4 or C6. The condensed products were converted to N-acetyl derivatives and were shown to have the α-configuration by PMR spectroscopy.
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