A simple synthetic route to tetrabenzo[16]- and hexabenzo[24]annulene systems using one-pot multiple Wittig reactions is presented. We report the characterization of the all-trans-isomer of tetrabenzo[16]annulene by NMR spectroscopy and X-ray diffraction. Several isomers of an unexpected, tetrabenzocyclooctatetraene dimer product are also isolated and identified by NMR- and X-ray diffraction studies
提出了使用一锅多重 Wittig 反应制备四苯并 [16]- 和六苯并 [24] 环烯系统的简单合成路线。我们通过核磁共振光谱和 X 射线衍射报告了四苯并 [16] 环烯的全反式异构体的表征。通过 NMR 和 X 射线衍射研究也分离和鉴定了一些意想不到的四苯并环辛四烯二聚体产物的异构体。(© Wiley-
VCH Verlag GmbH & Co. KGaA,69451 Weinheim,德国,2008 年)