5,6-dihydro-1,4-dithiin-2,3-dicarboximide 1,8-diazabicyclo[5.4.0]undec-7-ene salt   、                                                                                      
5-chloro-6-(2-thienyl)pyrazine-2,3-dicarbonitrile                                                                                                                                                                                              以
                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以70%的产率得到5-(5,7-dioxo-2,3,5,7-tetrahydro-1,4-dithiino[2,3-c]pyrrol-6-yl)-6-(2-thienyl)pyrazine-2,3-dicarbonitrile