toluene-4-sulfonic acid (S)-5-fluoromethyl-7-oxo-2,3-dihydro-7H-oxazolo[3,2-a]pyrimidin-2-ylmethyl ester   、                                                                                      2',3'-dichlorobiphenyl-4-ol                                                                                                                                                              在
                                                                                                                                                                                 
caesium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以53%的产率得到(S)-2-(2',3'-dichlorobiphenyl-4-yloxymethyl)-5-fluoromethyl-2,3-dihydro-oxazolo[3,2-a]pyrimidin-7-one