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