Preparation of 2,5-Disilylated Thiophene Derivatives and Their Conversion to 2,5-Dihalo Derivatives
摘要:
2,5-Disilylated thiophenes were prepared and readily oxidized with m-chloroperbenzoic acid (m-CPBA) to give the corresponding 1,1-dioxides. The thiophene dioxide was converted to 2,5-dihalogenothiophene dioxides with halogenating agents.
The purpose of this study was to obtain a rapid, efficient, and environmentally friendly methodology for the synthesis of highly pure thiophene oligomers. The solvent-free, microwave-assistedcoupling of thienyl boronic acids and esters with thienyl bromides, using aluminum oxide as the solid support, allowed us to rapidly check the reaction trends on changing times, temperature, catalyst, and base
The complex, HOF·MeCN made directly by bubbling fluorine through aqueous MeCN, oxidizes various types of thiophenes to the corresponding S,S-dioxides, including ones which could not be oxidized by any other method.
A novel method for the oxidation of thiophenes. Synthesis of thiophene 1,1-dioxides containing electron-withdrawing substituents
作者:V. G. Nenajdenko、A. M. Moiseev、E. S. Balenkova
DOI:10.1007/s11172-005-0107-9
日期:2004.10
A novel method for the synthesis of thiophene 1,1-dioxides by oxidation of substituted thiophenes with trifluoroperoxyacetic acid was developed. The effect of the solvent nature on the course of the reaction was studied and optimum conditions for the oxidation of thiophenescontaining various functional groups were found. Previously unknown thiophene dioxides were obtained.
Stimuli-Responsive Azulene-Based Conjugated Oligomers with Polyaniline-like Properties
作者:Elizabeth Amir、Roey J. Amir、Luis M. Campos、Craig J. Hawker
DOI:10.1021/ja203267g
日期:2011.7.6
Novel azulene building blocks, prepared via the cycloaddition of thiophene-S,S-dioxides and fulvenes, allow for incorporation of the seven-membered ring of the azulene nucleus directly into the backbone of conjugated materials. This unique mode of incorporation gives remarkably stable, stimuli-responsive materials upon exposure to acid. This simple doping/dedoping strategy provides for effective optical
A facile route to thiophene-1,1-dioxides bearing electron-withdrawing groups
作者:Valentine G Nenajdenko、Andrew E Gavryushin、Elizabeth S Balenkova
DOI:10.1016/s0040-4039(01)00732-8
日期:2001.6
thiophene-1,1-dioxides with strong EWGs has been described to date. Trifluoroperacetic acid in acetonitrile in the absence of water is shown to oxidise thiophenes, including examples possessing an electron-withdrawinggroup such as sulfonyl or alkoxycarbonyl. An easy and ready for scale-up procedure is developed, some formerly unknown thiophene-1,1-dioxides are obtained.