[2.2]Paracyclophane/Dehydroannulene Hybrids: Probing the Aromaticity of the Dehydro[14]annulene Framework
作者:Heino Hinrichs、Axel K. Fischer、Peter G. Jones、Henning Hopf、Michael M. Haley
DOI:10.1021/ol0514552
日期:2005.8.1
The synthesis of [2.2]paracyclophane/dehydro[14]annulene hybrids 1 and 2 is reported. Comparison of the proton NMR spectra of 1 and 2 with their open precursors and with related model compounds reveals the pronounced effect of macrocycle formation upon the cyclophane protons H15/H16, which lie above the shielding cone of the diatropic [14]annulene moiety. [structure: see text]
The Structures of Three [2.2]Paracyclophane Derivatives with Anellated Four-Membered Rings
作者:Henning Hopf、Heino Hinrichs、Ludger Ernst、Peter G. Jones、Virgil Boekelheide
DOI:10.1002/ijch.201100093
日期:2012.2
The structures of the three benzocyclobutenophanes 1 a, 1 b (2 stereoisomers), and 11 have been determined by NMR spectroscopy and X‐ray structural analysis. The preparation of 11 from 4,5‐diethynyl[2.2]paracyclophane (9) is described.