Radical Alkyne
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‐Annulation Reactions for the Synthesis of Functionalized Phenalenes, Benzanthrenes, and Olympicene
作者:Nikolay P. Tsvetkov、Edgar Gonzalez‐Rodriguez、Audrey Hughes、Gabriel dos Passos Gomes、Frankie D. White、Febin Kuriakose、Igor V. Alabugin
DOI:10.1002/anie.201712783
日期:2018.3.26
cyclization reactions at a peri position were used for the synthesis of polyaromatic compounds. Depending on the choice of reaction conditions and substrate, this flexible approach led to Bu3Sn‐substituted phenalene, benzanthrene, and olympicene derivatives. Subsequent reactions with electrophiles provided synthetic access to previously inaccessible functionalized polyaromatic compounds.
Oxidative Electrocyclization of Diradicaloids: C–C Bonds for Free or How to Use Biradical Character for π-Extension
作者:Mikhail Feofanov、Vladimir Akhmetov、Dmitry I. Sharapa、Konstantin Amsharov
DOI:10.1021/acs.orglett.0c01717
日期:2020.8.7
Herein, we show that biradical character and appropriate distribution of spin density can be used for synthetic purposes. We demonstrate the rational domino annulation that includes dehydrative π-extension (DPEX) as the initiation step and subsequent oxidative electrocyclizations (EC) promoted by favorable localization of the unpaired electrons enabling up to four C–C bonds formed during the reaction.
Towards nanographenes: Domino-DPEX (dehydrative π-extension) is a new synthetic approach to extended nanographenes containing a perylene or terrylene core. The pronounced regioselctivity towards aldehyde groups in different positions makes DPEX an excellent tool for implementing pre-programmed multiple annulation of simple precursors of elusive nanographenes. This approach enables the formation of
CYCLOPOLYARYLENE COMPOUND AND METHOD OF MANUFACTURING SAME
申请人:Itami Kenichiro
公开号:US20140066661A1
公开(公告)日:2014-03-06
A cyclopolyarylene compound represented by Formula (1):
wherein k is the same or different, and each represents 0, 1 or 2; m is the same or different, and each represents 1, 2 or 3; and n represents 3, 4, 5 or 6.
Oxidized divinyl oligoacene-bridged diruthenium complexes: bridged localized radical characters and reduced aromaticity in bridge cores
作者:Ya-Ping Ou、Jing Zhang、Yuxuan Hu、Jun Yin、Chunyan Chi、Sheng Hua Liu
DOI:10.1039/d0dt02883e
日期:——
predicted via time-dependent DFT calculations suggested that strong bridged ligands participate in redox processes. NIR absorptions were not observed in complexes 4+ and 5+ possibly because of instability in their twisted and noncoplanar geometry. Electron paramagnetic resonance results and spin density distribution demonstrated that the bridged localized degrees of 1+–5+ successively increased with the extension