2-氰乙基N,N-二异丙基氯亚磷酰胺 、
8-[2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-α-D-erythro-pentofuranosyl]-2-{[(dibutylamino)methylidene]amino}imidazo[1,2-a]-1,3,5-triazin-4(8H)-one 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.33h,
以83%的产率得到8-[2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-α-D-erythro-pentofuranosyl]-2-{[(dibutylamino)methylidene]amino}imidazo[1,2-a]-1,3,5-triazin-4(8H)-one 3'-(2-cyanoethyl diisopropylphosphoramidite)