2-氰乙基N,N-二异丙基氯亚磷酰胺 、
1-<3-deoxy-3-C-hydroxymethyl-2-O-(2-methoxyethoxymethyl)-5-O-(4,4'-dimethoxytriphenylmethyl)-β-D-erythro-pentofuranosyl>thymine 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以61%的产率得到1-<3-deoxy-5-O-dimethoxytrityl-3-C-hydroxymethyl-2-O-(2-methoxyethoxymethyl)-β-D-erythro-pentofuranosyl>thymine 2-cyanoethyl N,N-diisopropylphosphoramidite