5-ethynyl-1-{4-fluoro-5-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-tetrahydrofuran-2-yl}-1H-pyrimidine-2,4-dione                                                                                                                                                              在
                                                                                                                                                                                 
一溴化碘                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        以45%的产率得到5-(1-bromo-2-iodo-vinyl)-1-{4-fluoro-5-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-tetrahydrofuran-2-yl}-1H-pyrimidine-2,4-dione