A new copper complex on graphene oxide: A heterogeneous catalyst for
<i>N</i>
‐arylation and C‐H activation
作者:Ayushi Mittal、Shweta Kumari、Parmanand、Deepak Yadav、Sunil K. Sharma
DOI:10.1002/aoc.5362
日期:2020.2
PXRD, UV–Visible, TGA, XPS, FESEM, TEM, EDAX, Elemental mapping, BET, CHNS and AAS analysis. The complex has been found to be efficient and reusable heterogeneous catalyst for the N‐arylation and C‐Hactivation reactions, both the catalytic reactions were found to be simple, cleaner and give high yields (~ 90%) of product. The catalyst can be easily filtered out from the reaction mixture and reused up
氧化石墨烯负载的Cu(II)配体配合物(GO @ AP / L-Cu)已被合成并通过FT-IR,拉曼,PXRD,UV-可见,TGA,XPS,FESEM,TEM,EDAX,元素图谱,BET和表征,CHNS和AAS分析。已发现该络合物是一种有效且可重复使用的N异相催化剂芳基化反应和CH活化反应,发现这两种催化反应都简单,清洁,并能获得高收率(〜90%)的产品。可以容易地将催化剂从反应混合物中滤出并重复使用多达四次,而不会显着降低催化活性。在将水性介质用于反应和催化剂稳定性的意义上,所报道的方法是经济且新颖的。所有分离出的有机产物均根据其物理和光谱数据得到充分表征。
Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker
作者:Bingbing Lai、Fuming Mei、Yanlong Gu
DOI:10.1002/asia.201800567
日期:2018.9.4
bifunctional silica‐based solid catalyst that possessed an ionicliquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable
cationic [Ag(IPr)2]PF6 [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene] complex proved to be a versatile and highly efficient catalyst for the production of propargylamines by using the A3-coupling reaction. The reaction conditions were equally applicable to aliphatic and aromatic aldehydes and alkynes, including highly hindered aromatic aldehydes. Progargylamines were prepared in short reaction times
Propargyl Amine Synthesis Catalysed by Gold and Copper Thin Films by Using Microwave-Assisted Continuous-Flow Organic Synthesis (MACOS)
作者:Gjergji Shore、Woo-Jin Yoo、Chao-Jun Li、Michaelâ G. Organ
DOI:10.1002/chem.200902396
日期:2010.1.4
An effective multi‐component reaction (MCR) protocol has been developed for the construction of propargylamines from aldehydes, amines and terminal alkynes by using microwave‐assisted continuous‐flow organicsynthesis (MACOS). The process is catalysed by thinfilms of either copper or gold that achieve temperatures in excess of 900 °C when irradiated with low levels of microwave power. The process
A solventless Mannichcondensation of aldehydes, amines, and terminal alkynes catalysed by 10 mol% of CuCl2 was investigated. The components were simply mixed and heated together under vacuum, without any need of solidsupport or solvent. This results in the formation of Mannichproducts in high yields.