二苯并[ b , f ][1,4]恶氮、二苯并[ b , f ] [1,4]硫氮和二苯并[ b , e ]氮杂衍生物与手性阳离子二胺钌催化剂的高效不对称氢化反应已被开发出来,得到多样的手性七元 N-杂环化合物,具有优异的结果(高达 99% 的产率和 99% 的 ee)。此外,发现催化剂抗衡阴离子在二苯并[ b,f ][1,4]噻氮和二苯并[ b,e ]衍生物的加氢反应中明显调节对映体选择性。
Copper Powder Catalyzed Direct Ring-Opening Arylation of Benzazoles with Aryl Iodides in Polyethylene Glycol
作者:Lifang Yao、Qing Zhou、Wei Han、Shaohua Wei
DOI:10.1002/ejoc.201201166
日期:2012.12
The expedient and efficient copperpowdercatalyzeddirectring-openingarylation of benzazoles with aryliodides in polyethyleneglycol that proceeds in the absence of an added ligand has been developed. The protocol provides facile access to 2-(arylthio)anilines and 2-phenoxyanilines in high yields with a wide tolerance of functional groups. Transmission electron microscopy confirmed that the active
An efficient regioselective synthesis of 4-chalcogen-substituted arylamines by FeF3-catalyzed sulfenylation and selenation of arylamines has been developed. In the presence of FeF3 and I2, a variety of arylamines underwent the reaction with disulfides or diselenides to afford the corresponding 4-sulfenyl- or 4-selenenylarylamines in moderate to good yields.
An Efficient Heterogeneous Cu-Grafted Mesoporous Organosilicas Nanocatalyst for Two and Three Component C—S Coupling Reactions
作者:John Mondal、Noor Salam、Asim Bhaumik
DOI:10.1166/jnn.2013.7574
日期:2013.7.1
mesoporous organosilicas with Cu(OAc)2 in absolute ethanol produced Cu(II)-grafted mesoporous nanocatalysts 1 and 2, respectively. Powder XRD, HR TEM, FE SEM, N2 sorption and EPR experimental tolls are employed to characterize these Cu-grafted furfural-imine functionalizednanocatalysts. Cu-grafted MCM-41 (1) showed very good catalytic efficiency for the coupling of aryl bromides and thiophenol under
Arylthiolation of Arylamine Derivatives with (Arylthio)- pyrrolidine-2,5-diones
作者:Hua Tian、Haijun Yang、Changjin Zhu、Hua Fu
DOI:10.1002/adsc.201400929
日期:2015.2.9
AbstractA simple and efficient method for arylthiolation of arylamines has been developed. The protocol uses (arylthio)pyrrolidine‐2,5‐diones as the arylthiolating reagents, acetonitrile as the solvent, and no catalyst and additive are required, which avoids contamination from the transition metal catalysts in the target products. Therefore, the present method should provide a convenient, efficient and practical strategy for the synthesis of other aryl sulfides.magnified image
Perfluoroalkylsulfonamidoaryl compounds
申请人:Minnesota Mining and Manufacturing Company
公开号:US04005141A1
公开(公告)日:1977-01-25
Phenyl-substituted perfluoroalkanesulfonanilides in which the phenyl rings are linked by sulfur, sulfinyl or sulfonyl and salts thereof in which the rings and the perfluoroalkylsulfonamido nitrogen are optionally substituted. The compounds are active herbicides and some are anti-inflammatory agents and analgesic agents.