5-N-(2,2,6,6-tetramethyl-1-oxidopiperidin-4-yl)-1-N-(2,2,6,6-tetramethyl-1-oxopiperidin-1-ium-4-yl)tetracyclo[3.2.0.02,7.04,6]heptane-1,5-dicarboxamide 在
palladium on activated charcoal 作用下,
以
乙酸乙酯 为溶剂,
以95%的产率得到2-N-(2,2,6,6-tetramethyl-1-oxidopiperidin-4-yl)-3-N-(2,2,6,6-tetramethyl-1-oxopiperidin-1-ium-4-yl)bicyclo[2.2.1]hepta-2,5-diene-2,3-dicarboxamide