Acetic acid 2-((2R,3S,4R,5R)-4-hydroxy-2-hydroxymethyl-5-{6-[2-(4-nitro-phenyl)-ethoxycarbonylamino]-purin-9-yl}-tetrahydro-furan-3-yloxy)-ethyl ester 在
吡啶 、
potassium carbonate 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 78.0h,
生成 (9-{(2R,3R,4R,5R)-4-(2-Hydroxy-ethoxy)-5-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-3-[2-(4-nitro-phenyl)-ethoxysulfonyloxy]-tetrahydro-furan-2-yl}-9H-purin-6-yl)-carbamic acid 2-(4-nitro-phenyl)-ethyl ester