1-hydroxy-4-[2-[2-[2-(1-hydroxy-2,2,6,6-tetramethyl-3H-pyridin-4-yl)ethynyl]phenyl]ethynyl]-2,2,6,6-tetramethyl-3H-pyridine                                                                                                                                                              在
                                                                                                                                                                                 
lead dioxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 10.0h,
                                                                                                                以89%的产率得到2,2,6,6-tetramethyl-4-[2-[2-[2-(2,2,6,6-tetramethyl-1-oxido-3H-pyridin-4-yl)ethynyl]phenyl]ethynyl]-3H-pyridin-1-ium 1-oxide