| 摘要 |
A compound of formula (A) or salt thereof: wherein each of R1, R2, and R3 independently represents hydrogen, alkyl, aryl, acyl, sulfonyl, or silyl; P represents hydrogen or a hydroxy protective group. This compound may be used an intermediate for making a 2-deoxy-2,2-difluoro-D-ribofuranosyl nucleosides, such as gemcitabine.
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