n4-Benzoyl-2'-o-[(3-oxobutyl)methyl]cytidine 、
4,4'-双甲氧基三苯甲基氯 在
吡啶 、 Acetonitrile ethyl acetate 作用下,
以
吡啶 为溶剂,
反应 4.0h,
以provided N4-Benzoyl-2′-O-[(2-butanone-4-hydroxy)methyl]-5′-(4,4′-dimethoxytrityl)cytidine (7) as a white foam的产率得到n4-Benzoyl-2'-o-[(3-oxobutyl)methyl]-5'-(4,4'-dimethoxytrityl)cytidine