The one-electron oxidation of biphenyl-2-ylethylenes. Subsequent chemical reactivity controlled by electron return or proton transfer
作者:Ren� Lapouyade、Patrice Villeneuve、Aziz Nourmamode、Jean-Pierre Morand
DOI:10.1039/c39870000776
日期:——
Biphenyl-2-ylethylenes react with (4-BrC6H4)3N˙+SbCl6– to give the radical cation of the electrocyclization product which initiates a protic catalysis to the related fluorenes or, in presence of 2,6-di-t-butylpyridine or water, lead stoicheiometrically to phenanthrenes; with photochemical oxidants only phenanthrenes or 9,10-dihydrophenanthrenes are obtained, with an efficiency related to the polarity
联苯-2- ylethylenes与反应(4- BRC 6 ħ 4)3 Ñ +的SbCl 6 - ,得到发起质子催化现有芴,或在2,6-二存在下electrocyclization产物的自由基阳离子-叔丁基吡啶或水,从化学计量学上导致菲;用光化学氧化剂只能得到菲或9,10-二氢菲,其效率与溶剂的极性以及三重态供体和自由基离子对的相对能量有关。