Synthesis of Unsymmetrical Diorganyl Chalcogenides under Greener Conditions: Use of an Iodine/DMSO System, Solvent- and Metal-Free Approach
作者:Sumbal Saba、Jamal Rafique、Antonio L. Braga
DOI:10.1002/adsc.201500024
日期:2015.5.4
Herein, we report a greeneriodine‐catalyzed protocol to access different types of unsymmetricaldiorganylchalcogenides. This new approach works in the absence of solvent and metal. The desired products were obtained in good to excellent yields using one equivalent of arylboronic acids, half an equivalent of various diorganyl dichalcogenides, iodine (10 mol%) as a catalyst and 2 equivalents of dimethyl
Trichloroisocyanuric Acid‐Promoted Synthesis of Arylselenides and Aryltellurides from Diorganyl Dichalcogenides and Arylboronic Acids at Ambient Temperature
作者:Nan Sun、Kai Zheng、Pengyuan Sun、Yang Chen、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1002/adsc.202100371
日期:2021.7.20
method for the synthesis of arylselenides and aryltellurides has been established based on the oxidative cross-coupling between diorganyl dichalcogenides and aryl boronic acids. With trichloroisocyanuric acid as an oxidant, the reaction proceeded smoothly to afford the desired products in 45–97% yields at ambient temperature. Three reaction reagents used in this method are stoichiometric and the oxidation
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
作者:Nirmalya Mukherjee、Debasish Kundu、Brindaban C. Ranu
DOI:10.1002/adsc.201600933
日期:2017.1.19
develop a decyanative cross‐coupling through metal‐assisted nucleophilic displacement, which is less explored so far. Thus, a decyanative cross‐coupling of aryl selenocyanate with aryl‐/alkylacetylenes, boronic acids and silanes has been accomplished by a copper‐assisted nucleophilic displacement reaction for an easy access to a series of diaryl, aryl alkyl, aryl vinyl and aryl alkynyl selenides. The best
传统上,金属催化的交叉偶联反应受不同亲核试剂取代卤素,甲苯磺酸盐等离去基团的控制,从而导致碳-碳和碳-杂原子键的形成。除了传统的离去基团在偶联反应中的取代,脱氰交叉偶联也受到了当前的关注。这项工作的目的是通过金属辅助的亲核置换来发展脱氰交叉偶联,到目前为止,这一研究还很少。因此,通过铜辅助的亲核取代反应可以轻松实现一系列二芳基,芳基烷基,芳基乙烯基和芳基炔基硒化物的芳基硒酸芳基酯与芳基/烷基乙炔,硼酸和硅烷的脱氰交叉偶联。 。2,Ag 2 CO 3(20 mol%)和Cs 2 CO 3(1当量)在N-甲基吡咯烷酮(NMP)中于100°C放置8 h 。操作简单,产率高和通用性强的优点使该方法更具吸引力。已经提出了一种机械途径。银在脱氰过程中起关键作用。基于UV,EPR,HRMS和IR分析数据以及对照实验的结果,提出了这种脱氰碳-硒交叉偶联的可能机理。
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.