Please use this identifier to cite or link to this item:
|Title:||Intramolecular domino electrophilic and thermal cyclization of peri-ethynylene naphthalene oligomers||Authors:||Huang, X.
|Issue Date:||23-Dec-2011||Citation:||Huang, X., Zeng, L., Zeng, Z., Wu, J. (2011-12-23). Intramolecular domino electrophilic and thermal cyclization of peri-ethynylene naphthalene oligomers. Chemistry - A European Journal 17 (52) : 14907-14915. ScholarBank@NUS Repository. https://doi.org/10.1002/chem.201102506||Abstract:||The intramolecular electrophilic or thermal cyclization of arylene ethynylene precursors recently became a powerful method for the synthesis of new polycyclic aromatic hydrocarbons (PAHs). In this work, we investigated in detail the synthesis and intramolecular cyclization reaction of a series of peri-ethynylene naphthalene oligomers in which the ethynylene units are fixed in close proximity within the naphthalene framework. The high reactivity of these precursors led to simultaneous thermal cyclization reactions, even during their syntheses. Electrophilic cyclizations with iodine were also undertaken. Several new PAHs containing five-membered rings, for example, indeno[2,1-a]phenalene, acenaphtho[1,2-a]pyrene, and benzo- or naphtho-annulated fluoranthene derivatives, were synthesized and their structures were unambiguously determined by X-ray crystallographic analysis. Plausible mechanisms were proposed and it was demonstrated that oligomers most probably underwent intramolecular domino cyclization via either radical or cationic intermediates. The photophysical and electrochemical properties of these new PAHs were investigated and some of them displayed amphoteric redox behavior, due to the existence of five-membered rings. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.||Source Title:||Chemistry - A European Journal||URI:||http://scholarbank.nus.edu.sg/handle/10635/94084||ISSN:||09476539||DOI:||10.1002/chem.201102506|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 3, 2021
WEB OF SCIENCETM
checked on Mar 3, 2021
checked on Feb 28, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.