8-bromo-9-(2'-deoxy-2'C-ethynyl-5'O-dimethoxytrityl-β-D-arabinofuranosyl)-N2-[(dimethylamino)methylene]guanine 、
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 6.0h,
以46%的产率得到8-bromo-9-[2'-deoxy-2'C-ethynyl-3'O-[cyanoethyl(diisopropylamino)phosphanyl]-5'O-dimethoxytrityl-β-D-arabinofuranosyl]-N
2-[(dimethylamino)methylene]guanine