4-amino-1-((4aR,7R,8R,8aR)-8-fluoro-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl)-1H-pyrimidin-2-one                                                                                                                                                                                              以
                                                                                         
acetic acid monohydrate                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以to give (3R,4R,5R,6R) 4-amino-1-(4-fluoro-5-hydroxy-6-hydroxymethyl-tetrahydropyran-3-yl)-1H-pyrimidin-2-one的产率得到4-amino-1-((3R,4R,5R,6R)-4-fluoro-5-hydroxy-6-hydroxymethyl-tetrahydro-pyran-3-yl)-1H-pyrimidin-2-one