N-{4-[3-(hydroxy)-4-[(hydroxy)methyl]cyclopentylamino]-5-formylamino-6-oxo-1,6-dihydropyrimidin-2-yl}acetamide 、
4,4'-双甲氧基三苯甲基氯 在
吡啶 作用下,
反应 5.0h,
以74%的产率得到N-{4-[3-(hydroxy)-4-[(4,4'-dimetoxytrityloxy)methyl]cyclopentylamino]-5-formylamino-6-oxo-1,6-dihydropyrimidin-2-yl}acetamide