4′-bipyridiniumbis(tri-flimide) [C 8 V 2 +][Tf 2 N - ] 2 inTHF gave a dark blue solution of the corresponding quinoid C 8 V 0 ,which worked as an efficient organic reductant for Pd-catalyzedreductive coupling of aryl bromides to give the corresponding biphenylderivatives in good yields. After usual workup, [C 8 V 2 +][Tf 2 N - ] 2 wasrecovered and reused for generation of the organic reductant C 8 V 0 .
N, N'-二辛基-4,4'-双
吡啶鎓双(三
氟甲
酰亚胺)[C 8 V 2 +][Tf 2 N - ] 2 在THF 中的电还原得到相应醌型C 8 V 0 的深蓝色溶液,它作为一种有效的有机还原剂,用于芳基
溴化物的 Pd 催化还原偶联,以良好的产率得到相应的
联苯衍
生物。经过常规处理后,[C 8 V 2 +][Tf 2 N - ] 2 被回收并重新用于生成有机还原剂C 8 V 0 。