反应详情

In Non-Patent Document 6, L-ribose is used as a starting material, the methylation of the hydroxyl group at 1-position is carried out in methanol in the presence of sulfuric acid, the resultant mixture is then treated with lithium carbonate, the acetylation is then carried out in acetic acid and acetic anhydride, and concentrated sulfuric acid and acetic anhydride are further added thereto to carry out the acetolysis. A crude product is a mixture of α/β-anomers of 1,2,3,5-tetra-O-acetyl-L-ribofuranose. The crude product is treated with water and isopropyl alcohol to obtain 1,2,3,5-tetra-O-acetyl-β-L-ribofuranose at a total yield of 60%.