1-(5'-O-4,4'-dimethoxytrityl-2',3'-dideoxy-3'-C-formyl-β-D-erythro-pentofuranosyl)thymine 在
偶氮二异丁腈 N-溴代丁二酰亚胺(NBS) 、
氨 作用下,
反应 2.0h,
以84%的产率得到(2S,3S,5R)-2-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-carboxylic acid amide