1-<5'-O-(4-monomethoxytrityl)-2',3'-dideoxy-2',3'-(N-glycine methyl ester)epimino-β-D-ribofuranosyl>uracil 在
溶剂黄146 作用下,
以76%的产率得到((2S,3R,3aS,9aR)-2-Hydroxymethyl-6-oxo-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-3-ylamino)-acetic acid methyl ester