二碳酸二叔丁酯 、
5'-dimethoxytrityl N-benzoylcytidine 在
sodium hydride 作用下,
生成
Carbonic acid (2R,3R,4R,5R)-2-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-5-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-3-yl ester tert-butyl ester 、 Carbonic acid (2R,3S,4R,5R)-5-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-3-yl ester tert-butyl ester 、 Carbonic acid (2R,3R,4R,5R)-2-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-5-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-tert-butoxycarbonyloxy-tetrahydro-furan-3-yl ester tert-butyl ester