4-N-Benzoyl-5'-O-(4,4'-dimethoxytrityl)-2'-O-tetrahydrofuranylcytidine 、
N,N,N,N-四异丙基二氨基磷酸甲酯 在
diisopropylhydrotetrazole 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以92%的产率得到Diisopropyl-phosphoramidous acid (2R,3R,4R,5R)-5-(4-benzoylamino-2-oxo-2H-pyrimidin-1-yl)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-(tetrahydro-furan-2-yloxy)-tetrahydro-furan-3-yl ester methyl ester