2-(2-(4-fluorophenyl)-6,7-dihydrooxazolo[4,5-c]pyridin-5(4H)-yl)nicotinonitrile   、                                                                                      
2-氯吡嗪                                                                                                                                                              在
                                                                                                                                                                                 
2-(4-fluorophenyl)-5-(pyrazin-2-yl)-4,5,6,7-tetrahydrooxazolo[4,5-c]pyridine   、                                                                                                  Silica gel   、                                                                                                  
乙酸乙酯   、                                                                                                  hexanes   、                                                                                                  
乙醇                                                                                                                                  作用下,
                                                                                                                                                                                                                            以gave 2-(4-fluorophenyl)-5-(pyrazin-2-yl)-4,5,6,7-tetrahydrooxazolo[4,5-c]pyridine as a white solid (32 mg, 14%)的产率得到2-(4-fluorophenyl)-5-(pyrazin-2-yl)-4,5,6,7-tetrahydrooxazolo[4,5-c]pyridine