3-N-benzyloxymethyl-3'-O-tert-butyldiphenylsilyl-2'-O,5'-N-cyclo-5'-deoxy-(4-nitrophenoxy)carbonylaminoarabinouridine 、
3-N-benzyloxymethyl-5'-O-(4,4'-dimethoxytrityl)thymidine 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
反应 3.5h,
以87%的产率得到3-N-benzyloxymethyl-5'-O-dimethoxytritylthymidylyl-(3'-5'-carbamoyl)-5'-amino-3-N-benzyloxymethyl-3'-O-tert-butyldiphenylsilyl-2'-O,5'-N-cyclo-5'-deoxyarabinouridine