A Novel Route to a Bromo-Cyano-Substituted Azulene and Its Exploitation in the Construction of an Acetylenic Scaffold
作者:Michael Åxman Petersen、Kristine Kilså、Anders Kadziola、Mogens Brøndsted Nielsen
DOI:10.1002/ejoc.200601052
日期:2007.3
functionalized azulenes is devised from a dihydroazulene precursor. Thus, bromination of 1,1-dicyano-2-phenyl-1,8a-dihydroazulene followed by heating in the presence of bromide ions provides an efficient way to generate 3-bromo-1-cyano-2-phenylazulene. Formation of this somewhat unexpected product was confirmed by X-ray crystallographic analysis. It undergoes a palladium-catalyzed cross-coupling reaction with
从二氢蕈烯前体设计出一种功能化芴芴的新途径。因此,1,1-二氰基-2-苯基-1,8a-二氢脒的溴化,然后在溴离子存在下加热提供了一种生成3-溴-1-氰基-2-苯基芴的有效方法。X-射线晶体学分析证实了这种有点出乎意料的产物的形成。它与三甲基甲硅烷基乙炔发生钯催化的交叉偶联反应,为乙炔支架提供了一种新的薁基结构单元。氧化均偶联提供了一种薁二聚体,将其光学和电化学性质与其他薁进行比较。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)