Synthesis and Redox Behavior of 1,3-Bismethylthio-) and 1,3-Bis(phenylthio)azulenes Bearing 2- and 3-Thienyl Substituents by Palladium-Catalyzed Cross-Coupling Reaction of 2- and 6-Haloazulenes with Thienylmagnesium Ate Complexes
作者:Taku Shoji、Shunji Ito、Kozo Toyota、Takeaki Iwamoto、Masafumi Yasunami、Noboru Morita
DOI:10.1002/ejoc.200900508
日期:2009.9
Preparation of thienylazulenes 3–6 was established by the palladium-catalyzed cross-coupling reaction of the corresponding haloazulenes with thienylmagnesium ate complexes, which were readily prepared from the corresponding bromothiophenes. The reaction of 3–6 with several sulfoxides in the presence of Tf2O, followed by treatment with triethylamine afforded the corresponding 1,3-bis(methylthio)- and
噻吩基蕈烯 3-6 的制备是通过钯催化的相应卤代蕈烯与噻吩基镁酸盐配合物的交叉偶联反应建立的,该配合物很容易从相应的溴噻吩制备。在 Tf2O 存在下,3-6 与几种亚砜反应,然后用三乙胺处理得到相应的 1,3-双(甲硫基)-和 1,3-双(苯硫基)-2- 和 6-噻吩基天青素 7- 12 收益率良好。通过循环伏安法和微分脉冲伏安法检查了具有 2- 和 3-噻吩基取代的 3-12 的新型薁烯衍生物的氧化还原行为,这揭示了两性氧化还原行为。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)