A ligand-free copper catalyzed approach has been developed to the synthesis of 3,4,5-triaryl-1,2,4-triazoles and 2,5-diaryl-1,3,4-oxadiazoles by the direct arylation of corresponding 3,4-diaryl-1,2,4-triazoles and 2-aryl-1,3,4-oxadiazoles with aryl iodides using PEG-400 as reaction medium. The procedure is experimentally simple and free from addition of external chelating ligands or co-catalysts.
Efficient oxidative cyclization of <i>N</i>-acylhydrazones for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles using <i>t</i>-BuOI under neutral conditions
作者:Peng Gao、Yunyang Wei
DOI:10.1515/hc-2012-0179
日期:2013.4.1
in situ from t-BuOCl and NaI. A variety of 2,5-disubstituted1,3,4-oxadiazoles were synthesized in high yields within short reaction time. The method is also suitable for cyclization of N-acylhydrazones derived from heterocyclic aldehydes and aliphatic aldehydes. Mild reaction conditions and simple workup operations make the procedure a good alternative for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles
The preparation, characterization and catalytic activity of Ni NPs supported on porous alginate-<i>g</i>-poly(<i>p</i>-styrene sulfonamide-<i>co</i>-acrylamide)
作者:Sedigheh Alavinia、Ramin Ghorbani-Vaghei
DOI:10.1039/d1ra04022g
日期:——
Herein, we report the synthesis of nickel nanoparticles undermildconditionsusing porous alginate-g-poly(p-styrene sulfonamide-co-acrylamide) as a protecting/stabilizing agent and sodium borohydride as a reducing agent. The porous cross-linked polymericsupport was prepared via combining the use of sol-gel, nanocasting, and crosslinking techniques, in which the p-styrene sulfonamide monomer (PSSA)
Organic Semiconductor Material and Light-Emitting Element, Light-Emitting Device, Lighting System, and Electronic Device Using the Same
申请人:Seo Satoshi
公开号:US20100060155A1
公开(公告)日:2010-03-11
Disclosed is a novel organic semiconductor material which has a twisted quaterphenylene skeleton as a central unit and simultaneously possesses a skeleton having an electron-transporting property and a skeleton having a hole-transporting property at the terminals of the quaterphenylene skeleton. Specifically, the organic semiconductor material has a [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group, and one of the terminals of the [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group is bonded to a skeleton having an electron-transporting property such as a benzoxazole group or an oxadiazole group. A skeleton having a hole-transporting property such as diarylamino group is introduced at the other terminal. This structure allows the formation of a compound having a bipolar property, a high molecular weight, an excellent thermal stability, a large band gap, and high triplet excitation energy.