6-[(2-methylpropanoyl)amino]-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,5-dihydro-{3-[di(prop-2-ynl)amino]prop-1-ynyl}-4H-pyrazolo[3,4-d]pyrimidin-4-one 、
4,4'-双甲氧基三苯甲基氯 在
吡啶 、
N,N-二异丙基乙胺 作用下,
反应 3.0h,
以86%的产率得到6-[(2-methylpropanoyl)amino]-1-(2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl)-1,5-dihydro-3-{[di(prop-2-ynl)amino]prop-1-ynyl}-4H-pyrazolo[3,4-d]pyrimidin-4-one