N4-phenoxyacetylamino-1-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-5-methylcytosine 在
吡啶 、
吡啶盐酸盐 作用下,
以
吡啶 为溶剂,
反应 2.0h,
以83%的产率得到3-phenoxymethyl-6-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-8-methyl<1,2,4>triazolo<4,3-c>pyrimidin-5(6H)-one