反应详情

Hydroxymethylation of the 5′-aldehyde is performed as per the method of Cannizzaro which is well documented in the literature (Jones, G. H., et. al., J. Org. Chem. 1979, 44, 1309-1317). These conditions are expected to additionally remove the 2′-O-acetyl group. Generally, Briefly, formaldehyde (2.0 eq., 37% aq.) and NaOH (1.2 eq., 2 M) is added to a solution of Compound 10 in 1,4-dioxane. After stirring at room temperature for several hours, this mixture is neutralized with acetic acid, evaporated to dryness, suspended in methanol, and evaporated onto silica gel. The resulting mixture is added to the top of a silica gel column and eluted using an appropriate solvent system to give Compound 11.

1. customto additionally remove the 2′-O-acetyl group
2. customevaporated to dryness
3. customevaporated onto silica gel
4. additionThe resulting mixture is added to the top of a silica gel column
5. washeluted