synthesized through CAr-Se bondformation using readily available copper(I) iodide as catalyst under mild reaction conditions (82 ˚C) from aryl iodides and diphenyl diselenide. In this coupling reaction, solvent acetonitrile acts as ligand for copper(I) iodide and no external ligand is required. Less reactive aryl bromides also provide the diaryl selenides in good isolated yields. copper catalyst - acetonitrile
A highly efficient and reusable MCM-41-immobilized bipyridine copper(<scp>i</scp>) catalyst for the C–Se coupling of organoboronic acids with diaryl diselenides
作者:Hong Zhao、Yuanyuan Jiang、Qiurong Chen、Mingzhong Cai
DOI:10.1039/c4nj01687d
日期:——
A highlyefficient MCM-41-immobilized bipyridine copper(I) complex [MCM-41-bpy-CuI] was prepared from 4,4′-bis[3-(triethoxysilyl)propylaminomethyl]-2,2′-bipyridine via immobilization on the mesoporous material MCM-41, followed by reaction with CuI. In the presence of 5 mol% MCM-41-bpy-CuI, the cross-coupling reaction of organoboronicacids with diaryl diselenides proceeded smoothly in DMSO/H2O (2/1)
A高效MCM-41固定联吡啶铜(我)络合物[MCM-41联吡啶翠]从4,4'-双[3-(三乙氧基硅基)丙基氨基] -2,2'-联吡啶制备通过固定上介孔材料MCM-41,然后与CuI反应。在5 mol%MCM-41-bpy-CuI的存在下,有机硼酸与二芳基二硒化物的交叉偶联反应在DMSO / H 2 O(2/1)中于110°C的空气中顺利进行,得到了多种二有机基硒化物,收率好至极好。可以通过简单过滤反应溶液来回收和再循环这种多相铜催化剂,并在不降低活性的情况下,至少进行了10次连续试验。
Efficient Heterogeneous Copper-Catalysed C–Se Coupling of Aryl Iodides with Symmetrical Diselenides towards Unsymmetrical Monoselenides
作者:Ruonan Zhao、Chenyu Yan、Yuanyuan Jiang、Mingzhong Cai
DOI:10.3184/174751918x15409874473285
日期:2018.11
A highly efficient heterogeneous copper(I)-catalysed C–Se coupling of aryl iodides with diaryl diselenides was achieved in dimethylformamide at 110 °C under neutral conditions by using a 10 mol% of bipyridine-functionalised MCM-41-supported copper(I) complex [bpy-MCM-41-CuI] as the catalyst and magnesium as the reductive reagent, yielding a variety of unsymmetrical diaryl selenides in good to excellent
A general and green procedure for the synthesis of organochalcogenides by CuFe<sub>2</sub>O<sub>4</sub>nanoparticle catalysed coupling of organoboronic acids and dichalcogenides in PEG-400
作者:Debasish Kundu、Nirmalya Mukherjee、Brindaban C. Ranu
DOI:10.1039/c2ra22415a
日期:——
A general and efficient procedure has been developed for the synthesis of organochalcogenides (selenides and tellurides) by a simple reaction of organoboronic acids and dichalcogenides catalysed by CuFe2O4 nanoparticles in PEG-400 without any ligand. This protocol offers the scope for access to a wide spectrum of chalcogenides including diaryl, aryl–heteroaryl, aryl–styrenyl, aryl–alkenyl, aryl–allyl, aryl–alkyl and aryl–alkynyl versions. The catalyst is magnetically separable and recyclable eight times without any loss of appreciable catalytic activity. The products are obtained in high purities after evaporation of solvent followed by filtration column chromatography.
diaryl selenides has been developed by a copperferritenanoparticle catalyzed reaction of aryl iodides/aryl bromides with diphenyldiselenide in the presence of base and solvent at 120 °C. Using this protocol, a variety of diselenides were obtained in good to excellent yields. The copperferritenanoparticles were magnetically separated, recycled, and reused up to three cycles.
在碱和溶剂存在下,在 120 °C 下,通过铁氧体铜纳米粒子催化芳基碘化物/芳基溴化物与二苯基二硒化物反应,开发了一种简单有效的合成二芳基硒化物的方法。使用该协议,以良好到极好的收率获得了多种二硒化物。铜铁氧体纳米粒子被磁性分离、回收和重复使用最多三个循环。