5-N-acetyl-amino-3-(5'-O-tert-butyldimethylsilyl-2'-deoxy-β-D-ribofuranosyl)-3H,6H-thiazolo[4,5-d]pyrimidine-2,7-dione 、 5-N-acetyl-amino-3-(5'-O-tert-butyldimethylsilyl-3'-deoxy-β-D-ribofuranosyl)-3H,6H-thiazolo[4,5-d]pyrimidine-2,7-dione 在
氢氟酸 、
水 作用下,
以
乙腈 为溶剂,
以31%的产率得到5-N-acetyl-amino-3-(2'-deoxy-β-D-ribofuranosyl)-3H,6H-thiazolo[4,5-d]pyrimidine-2,7-dione