[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-[[[2-(6-aminopurin-9-yl)acetyl]amino]carbamothioylamino]oxan-2-yl]methyl acetate 在
sodium methylate 、 cation-exchange resin 作用下,
以
甲醇 为溶剂,
反应 0.25h,
以91%的产率得到[(2R,3R,4S,5R,6R)-3-acetyloxy-2-[[[2-(6-aminopurin-9-yl)acetyl]amino]carbamothioylamino]-5-hydroxy-6-(hydroxymethyl)oxan-4-yl] acetate