3-[2-deoxy-5-O-(4,4'-dimethoxytriphenylmethyl)-β-D-erythro-pentofuranosyl]-6-(hexyl)-furo[2,3-d]pyrimidin-3H-2-one 、
2-氰乙基N,N-二异丙基氯亚磷酰胺 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.75h,
以61%的产率得到3-[2-deoxy-5-O-(4,4'-dimethoxytriphenylmethyl)-β-D-erythro-pentofuranosyl]-6-(hexyl)-furo[2,3-d]pyrimidin-3H-2-one 3'-(2-cyanoethyl-N,N-diisopropylphosphoramidite)