Solvent-Controlled Halo-Selective Selenylation of Aryl Halides Catalyzed by Cu(II) Supported on Al<sub>2</sub>O<sub>3</sub>. A General Protocol for the Synthesis of Unsymmetrical Organo Mono- and Bis-Selenides
作者:Tanmay Chatterjee、Brindaban C. Ranu
DOI:10.1021/jo401062k
日期:2013.7.19
Alumina-supported Cu(II) efficiently catalyzes selenylation of aryl iodides and aryl bromides by diaryl, dialkyl, and diheteroaryl diselenides in water and PEG-600, respectively, leading to a general route toward synthesis of unsymmetrical diaryl, aryl–alkyl, aryl–heteroaryl, and diheteroaryl selenides. A sequential reaction of bromoiodobenzene with one diaryl/diheteroaryl/dialkyl diselenide in water and another
A novel, practical and metal-free approach for the regioselective selenation of coumarins employing (bis(trifluoroacetoxy)iodo)benzene (PIFA) at room temperature is presented. The developed method is suitable for a wide substrate scope and affords 3-selenyl coumarins in good to excellent yields with high selectivity. A radical mechanism is proposed for this new transformation. Furthermore, the application
Cu(<scp>ii</scp>) anchored nitrogen-rich covalent imine network (Cu<sup>II</sup>-CIN-1): an efficient and recyclable heterogeneous catalyst for the synthesis of organoselenides from aryl boronic acids in a green solvent
作者:Susmita Roy、Tanmay Chatterjee、Biplab Banerjee、Noor Salam、Asim Bhaumik、Sk Manirul Islam
DOI:10.1039/c4ra08909j
日期:——
A Cu(ii)-grafted covalent imine framework material has been designed, which catalyzes the C–Se cross-coupling reactions to obtain a library of organoselenides.
Solvent- and Metal-Free Chalcogenation of Bicyclic Arenes Using I<sub>2</sub>/DMSO as Non-Metallic Catalytic System
作者:Lais T. Silva、Juliano B. Azeredo、Sumbal Saba、Jamal Rafique、Adailton J. Bortoluzzi、Antonio L. Braga
DOI:10.1002/ejoc.201700744
日期:2017.9.1
study, we developed a greener and efficient protocol for the chalcogenylation of bicyclicarenesusing the I2/DMSOcatalyticsystem under solvent- and metal-free conditions. This protocol allowed access to several chalcogenated bicyclicarenes through C(sp2)-H bond functionalization, in good to excellent yields, using MW irradiation or conventional heating.
Synthesis of 3-chalcogenyl-indoles mediated by the safer reagent urea-hydrogen peroxide (UHP)
作者:Julia Rosa Menezes、Mylena Mendes Gularte、Fabiola Caldeira dos Santos、Juliano Alex Roehrs、Juliano Braun Azeredo
DOI:10.1016/j.tetlet.2023.154446
日期:2023.3
use of urea-hydrogen peroxide (UHP) as an oxidizing agent in the direct C3 chalcogenylation of indoles with diorganyl dichalcogenides, in the presence of an iodine source. This reagent provided a simple, efficient and safer reaction media, besides avoid problems related to the aqueous solutions oxidants. This method allowed the preparation of 20 compounds in good to excellent yields, being efficient