2-chloro-3-(thiomorpholine-4-yl)maleimide 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62%的产率得到5-[3-chloro-2,5-dioxo-4-(thiomorpholin-4-yl)-2,5-dihydropyrrol-1-yl]-6-(2-thienyl)pyrazine-2,3-dicarbonitrile