2-allyloxy-6-{(di-n-butylaminomethylidene)amino}-9-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-9H-purine 、
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 0.5h,
以66%的产率得到2-allyloxy-6-{(di-n-butylaminomethylidene)amino}-9-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-9H-purine 3'-[O-(2-cyanoethyl)-diisopropylphosphoramidite]