A mild and practical copper catalyzed amination of halothiophenes
作者:Zhikuan Lu、Robert J. Twieg
DOI:10.1016/j.tet.2004.11.017
日期:2005.1
We have found that N,N-dimethylethanolamine (deanol) is a useful solvent and ligand for copper catalyzed amination of a variety of unactivated and activated 2- or 3-halothiophenes. Primary amines, acyclic secondary amines, cyclic secondary amines and acyclic secondary amines with 2-hydroxyethyl functionality react with halothiophenes in moderate to excellent yields. The mildly basic conditions utilized are compatible with many functional groups. The animation of halobithiophenes has also been examined. The aminothiophenes produced by this method are important intermediates in a variety of electronic and optoelectronic materials. (C) 2004 Elsevier Ltd. All rights reserved.
US9353092B2
申请人:——
公开号:US9353092B2
公开(公告)日:2016-05-31
Electro-optical Properties of Neutral and Radical Ion Thienosquaraines
作者:Vito Maltese、Sante Cospito、Amerigo Beneduci、Bruna Clara De Simone、Nino Russo、Giuseppe Chidichimo、René A. J. Janssen
DOI:10.1002/chem.201601281
日期:2016.7.11
few newly synthesized thienosquaraines are presented. These properties are compared to those of the commercial 2,4‐bis[4‐(N,N‐diisobutylamino)‐2,6‐dihydroxyphenyl]squaraine. The stability of the radicalions formed in electrochemical processes strongly affects these properties, as shown by cyclic voltammetry, in situ spectroelectrochemistry, and quantum chemical calculations. Furthermore, all of the
The present disclosure provides compositions and methods for the synthesis and use of croconaine compounds. The disclosed compounds are easily prepared from croconic acid. A halothiophene is reacted with an alkanolamine, the resulting aminothiophene is modified by appending a desired functional group to the hydroxyl group, and the modified aminothiophene is reacted with croconic acid to form the final compound. Applications of such croconaine compounds include photothermal imaging, photothermal therapy, light-activated drug release, and tissue welding.