Acetic Anhydride → HCID 67930798, compound

Participants

Reaction Steps

A solution of 1,6-anhydro-2-azido-4-O-benzyl-2,3-dideoxy-β-D-ribo-hexopyranose (see Example 13) in methanol (20 ml) was subjected to transfer hydrogenation by heating under reflux with cyclohexene (7 ml) 5% and palladium on charcoal (0.5 g), added in three portions over a period of 6 h. Acetic anhydride (2.5 ml) was then added to the mixture at room temperature. After 2 h, the mixture was filtered, the filtrate was evaporated, and the residue chromatographed on silica gel to yield the title compound as a syrup (0.35 g, 52%), [α]D -28.7°; 13C-nmr data: 101.1 (C-1), 46.4 (C-2), 25.9 (C-3), 74.1 and 73.0 (C-4 and C-5), 65.8 (C-6), 70.5 (PhCH2O), 23.3 (NHCOCH3), 169.2 (NHCOCH3), 137.7 (q-aromatic), 128.5 (×2), 127.9, and 127.5 (×2, aromatic).

Provenance & Evidence