2-(4-chlorophenyl)-6-[3-(4-methylphenyl)sydnon-4-yl]-4-phenyl-1,2,4,5-tetrazinan-3-one                                                                                                                                                              在
                                                                                                                                                                                 
lead dioxide   、                                                                                                  
溶剂黄146                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 8.0h,
                                                                                                                以71%的产率得到2-(4-chlorophenyl)-6-[3-(4-methoxyphenyl)sydnon-4-yl]-4-phenyl-3,4-dihydro-3-oxo-1,2,4,5-tetrazin-1(2H)-yl radical