Synthesis, Properties, and Redox Behavior of Mono-, Bis-, and Tris[1,1,4,4,-tetracyano-2-(1-azulenyl)-3-butadienyl] Chromophores Binding with Benzene and Thiophene Cores
作者:Taku Shoji、Shunji Ito、Kozo Toyota、Masafumi Yasunami、Noboru Morita
DOI:10.1002/chem.200701981
日期:2008.9.19
Mono-, bis-, tris-, and tetrakis(1-azulenylethynyl)benzene and mono- and bis(1-azulenylethynyl)thiophene derivatives 5-10 have been prepared by Pd-catalyzed alkynylation of ethynyl arenes with 1-iodoazulene derivative or the 1-ethynylazulene derivative with tetraiodobenzene and iodothiophenes under Sonogashira-Hagihara conditions. Compounds 5-10 reacted with tetracyanoethylene in a [2+2] cycloaddition
单,双,三和四(1-氮杂烯基乙炔基)苯和单和双(1-氮杂烯基乙炔基)噻吩衍生物5-10是通过Pd催化乙炔基芳烃与1-碘杂氮杂烯衍生物的炔基化反应制得的。在Sonogashira-Hagihara条件下,具有四碘代苯和碘噻吩的1-ethynylazulene衍生物。化合物5-10在[2 + 2]环加成反应中与四氰基乙烯反应,得到相应的1,1,4,4,-四氰基-2-(5-异丙基-3-甲氧基羰基-1-氮烯基)-3-丁二烯基除了四(1-氮杂烯基乙炔基)苯衍生物的反应以外,发色团12-16的收率高。还通过双(1-氮杂烯基)乙炔(11)与四氰基乙烯(TCNE)的类似反应制备了1,1,4,4,-四甲基-2,3-双(1-氮杂烯基)丁二烯(17)。通过循环伏安法(CV)和微分脉冲伏安法(DPV)检查了新型a菁衍生物12-17的氧化还原行为,揭示了多步电化学还原性能。此外,通过可见光谱在电化学还原条件下观察到显着的颜色变化。