Transition-Metal-Free Method for the Synthesis of Benzo[b]thiophenes from o-Halovinylbenzenes and K2S via Direct SNAr-Type Reaction, Cyclization, and Dehydrogenation Process
摘要:
A new, highly efficient procedure for the synthesis of benzothiophenes from easily available o-halovinylbenzenes and potassium sulfide has been developed. The reaction tolerated a wide range of functionalities, and various 2-substituted benzo[b]thiophenes are provided in the high yields in the absence of a transition-metal catalyst.
General Method for Functionalized Polyaryl Synthesis via Aryne Intermediates
作者:Thanh Truong、Milad Mesgar、Ky Khac Anh Le、Olafs Daugulis
DOI:10.1021/ja504886x
日期:2014.6.18
complements transition-metal-catalyzed direct arylation and allows access to structures that are not easily accessible via other direct arylation methods. The reactions are highly functional-group tolerant, with alkene, ether, dimethylamino, trifluoromethyl, ester, cyano, halide, hydroxyl, and silyl functionalities compatible with reaction conditions.
Lithiation of S-(2-methylphenyl) N,N,N',N'-tetramethylphosphorodiamidothioate with sec-BuLi at -105° gave the corresponding benzylic anion which was acylated with various aromatic esters to give various deoxybenzoin derivatives in moderate to high yields. Acidic treatment of these products in refluxing formic acid gave 2-arylbenzo[b]thiophenederivatives. 2-Methylbenzo[b]thiophene and benzo[b]thiophen-2(3H)-one
S-(2-甲基苯基)N,N,N',N'-四甲基磷酸二酰胺基硫代硫酸盐与仲丁基锂在-105°锂化得到相应的苄基阴离子,该苄基阴离子被各种芳族酯酰化,以中等至高收率得到各种脱氧安息香衍生物。在回流甲酸中对这些产物进行酸性处理,得到了2-芳基苯并[ b ]噻吩衍生物。2-甲基苯并[ b ]噻吩和苯并[ b ]噻吩-2-(3- ħ也使用类似的方法制备) -酮。
[EN] HIGHLY EMISSIVE PYRIDINIUM ENOLATES<br/>[FR] ÉNOLATES DE PYRIDINIUM HAUTEMENT ÉMISSIFS
申请人:UNIV MELBOURNE
公开号:WO2019000024A1
公开(公告)日:2019-01-03
The present invention relates to certain pyridinium enolates which due to their high stokes shift find applications as fluorescent materials in solar concentrators. The invention also relates to solar concentrators containing molecules of this type.
Charge transport enhancement in supramolecular oligothiophene assemblies using Pt(<scp>ii</scp>) centers as a guide
作者:Amparo Ruiz-Carretero、Youssef Atoini、Tianyan Han、Alessandra Operamolla、Stefano Ippolito、Cataldo Valentini、Serena Carrara、Stephan Sinn、Eko Adi Prasetyanto、Thomas Heiser、Paolo Samorì、Gianluca Farinola、Luisa De Cola
DOI:10.1039/c9ta04364k
日期:——
interactions in the different supramolecular structures and in particular the inter-chromophoric distance were found to affect the hole mobility values estimated for the various semiconducting thiophene-based assemblies. The thiophene-containing architectures exhibit enhanced mobility values compared to the free ligand based ones. These results demonstrate that the supramolecular organization strategy can
Iodomethane is usually used as an electrophilic methylation reagent. Herein, we report its use as a C1 organocatalyst for the aerobic ortho-selective trifluoromethylation of pyridines in the absence of a transition metal. Trifluoroacetic acid (TFA) was employed as an inexpensive, readily available trifluoromethyl source. The reaction efficiently produced a variety of trifluoromethylation products,