((2S,4R)-4-acetoxy-5-(2-amino-6-methoxy-9H-purin-9-yl)-4-methyl-tetrahydrofuran-2-yl)methyl benzoate → (3R,5S)-2-(2-amino-6-methoxy-9H-purin-9-yl)-5-(hydroxymethyl)-3-methyl-tetrahydrofuran-3-ol

Participants

Reaction Steps

Methanolic ammonia (7N, 20 mL) was added to ((2S,4R)-4-acetoxy-5-(2-amino-6-methoxy-9H-purin-9-yl)-4-methyl-tetrahydrofuran-2-yl)methyl benzoate (from step 11) (1.53 g) and stirred at room temperature for 24 h in a sealed tube. The volatiles were evaporated under vacuum and the resulting residue was loaded directly on to the column and eluted with CH2Cl2/MeOH (10:1) as a gradient mixture to give 0.802 g of compound (79% yield). mp: 140° C.-142° C.

Provenance & Evidence