A compound of formula (A) or salt thereof:
wherein each of R
1
, R
2
, and R
3
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.
公式(A)的化合物或其盐:其中R1、R2和R3分别代表氢、烷基、芳基、酰基、磺酰基或
硅基;P代表氢或羟基保护基团。该化合物可用作制备2-脱氧-2,2-二
氟-
D-核糖呋喃核苷类药物,如
吉西他滨的中间体。