Novel Hybrid Thioamide Ligand Supported Copper Nanoparticles on SBA-15: A Copper Rich Robust Nanoreactor for Green Synthesis of Triazoles and Tetrazoles in Water Medium
作者:Fatemeh Pourhassan、Hossein Eshghi
DOI:10.1007/s10562-019-03031-y
日期:2020.5
groups via Willgerodt-Kindlerreaction. This porous material proved to be an effective host for the immobilization of inexpensive Cu(II) ions. The catalytically active Cu(I) species were generated automatically due to the reductive nature of thioamide modified surface of catalyst without use of any toxic reducing agents. The well stabilized Cu(I) species into the nano-channels of SBA-15 were used for synthesis
Design and Preparation of Hallow Mesoporous Silica Spheres Include CuO and Its Catalytic Performance for Synthesis of 1,2,3-Triazole Compounds via the Click Reaction in Water
novel nanostructured catalyst based on CuO included hallow mesoporous silica spheres (CuO–HMSS) was prepared for synthesis of 1,2,3-triazole compounds. The hallow silica spheres were synthesized via the hydrothermal procedure. The characterization of prepared catalyst was also performed applying several analysis techniques such as TEM and SEM, EDX, XRD, and ICP.Graphical Abstract CuO active sites in
Multicomponent click reactions catalysed by copper(I) oxide nanoparticles (Cu2ONPs) derived using Oryza sativa
作者:Randhir Rai、Dillip Kumar Chand
DOI:10.1007/s12039-020-01774-5
日期:2020.12
found to be effectively stabilizing the nanoparticles from agglomeration. Optical and microscopic techniques were suitably employed for the characterization of the nanoparticles of approximately 10 nm size. Furthermore, the specifically generated nanoparticles were found to be active catalysts in an aqueous medium for Azide-alkyne Huisgen cycloaddition (Click reaction) under base free condition via one-pot
A new protocol for the photoinduced copper(I)-catalyzedazide–alkynecycloaddition (CuAAC) was developed. The system utilizes mesoporous graphitic carbon nitride (mpg-N3C4) as a heterogeneous photocatalyst to realize the in situ formation of the required copper(I) catalyst by reducing copper(II) species upon UV or sunlight irradiation. The efficiency of the system in regard to its ability to photoinitiate
为光诱导的铜(I)催化的叠氮化物-炔烃环加成反应(CuAAC)开发了一种新的协议。该系统利用介孔石墨碳氮化物(mpg-N 3 C 4)作为非均相光催化剂,通过还原铜(II)实现原位形成所需的铜(I)催化剂。)受到紫外线或阳光照射的物种。关于在不同溶剂中光引发各种脂族和芳族叠氮化物和炔烃的CuAAC的能力,研究了该系统的效率。光热法测量证实,反应速率取决于光强度以及连续或间歇照射。重要的是,由于光催化剂的非均质性质,mpg-C 3 N 4可以很容易地分离出来并在进一步的反应中重新使用,而不会失去活性。
Synthesis of 1,4-disubstituted 1,2,3-triazoles<i>via</i>a three-component reaction in water in the presence of cux (X = Cl, I)
作者:Zhong-Xia Wang、Zhi-Gang Zhao
DOI:10.1002/jhet.5570440115
日期:2007.1
Three-componentreaction of alkyl halides, sodium azide and alkynes in water in the presence of CuX (X = Cl, I) afforded 1,4-disubstituted 1,2,3-triazoles in high yields. These reactions do not require any special precautions or existence of a reducing agent. The bistriazoles formed during the reaction can efficiently enhance the catalytic activity of the Cu(I) salts.