作者:Ole Storm、Ulrich Lüning
DOI:10.1002/1099-0690(200211)2002:21<3680::aid-ejoc3680>3.0.co;2-4
日期:2002.11
New 4-substituted concave pyridines 1b−d have been synthesised as precursors to allow extension of the pyridine π-system. With the Sonogashira coupling as the key synthetic step, the 4-iodo pyridine 1c was coupled with phenylacetylene (11) to give 1g in 77% yield. Because of its conjugated π system, the new concave pyridine 1g has UV absorption maxima at λmax1 = 286 nm and λmax2 = 303 nm with ϵmax1
新的 4-取代凹吡啶 1b-d 已被合成为前体,以允许吡啶 π 系统的扩展。以 Sonogashira 偶联作为关键合成步骤,4-碘吡啶 1c 与苯乙炔 (11) 偶联得到 1g,产率为 77%。由于其共轭 π 系统,新的凹形吡啶 1g 在 λmax1 = 286 nm 和 λmax2 = 303 nm 处具有紫外吸收最大值,其中 ϵmax1 = 43300 Lmol−1cm−1 和 ϵmax2 = 39300 Lmol−1cm−1,分别允许其潜力作为传感器的应用。(© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)