Copper-Catalyzed Huisgen 1,3-Dipolar Cycloaddition under Oxidative Conditions: Polymer-Assisted Assembly of 4-Acyl-1-Substituted-1,2,3-Triazoles
作者:Paula M. Diz、Alberto Coelho、Abdelaziz El Maatougui、Jhonny Azuaje、Olga Caamaño、Álvaro Gil、Eddy Sotelo
DOI:10.1021/jo400800j
日期:2013.7.5
We herein document the first example of a reliable copper-catalyzed Huisgen 1,3-dipolar cycloaddition underoxidativeconditions. The combined use of two polymer-supported reagents (polystyrene-1,5,7-triazabicyclo[4,4,0]dec-5-ene/Cu and polystyrene-2-iodoxybenzamide) overcomes the thermodynamic instability of copper(I) species toward oxidation, enabling the reliable Cu-catalyzed Huisgen 1,3-dipolar
Fine-Tunable Tris(triazolyl)methane Ligands for Copper(I)- Catalyzed Azide-Alkyne Cycloaddition Reactions
作者:Erhan Ozkal、Patricia Llanes、Fernando Bravo、Alessandro Ferrali、Miquel A. Pericàs
DOI:10.1002/adsc.201300887
日期:2014.3.10
modular tris(triazolyl)methaneligands for copper‐catalyzedazide–alkynecycloaddition (CuAAC) reactions is reported. The synthesis of the first generation ligand, tris(1‐benzyl‐1H‐1,2,3‐triazol‐4‐yl)methanol (1a), suitable for work in aqueous systems, is reported at the 50–100 mmol scale through a one‐stage, environmentally benign procedure. One‐stage procedures for the synthesis of tris(aryltriazolyl)methanol
据报道,已经准备了一个小的模块式三(三唑基)甲烷配体库,用于铜催化的叠氮化物-炔烃环加成反应(CuAAC)。据报道,适用于水性体系的第一代配体,三(1-苄基-1 H -1,1,2,3-三唑-4-基)甲醇(1a)的合成规模为50-100 mmol通过一个阶段性的,对环境无害的程序。设计用于电子微调催化性能和1a衍生醚2c的三(芳基三唑基)甲醇结构(1b,苯基; 1c,对三氟甲基苯基; 1d,对甲氧基苯基)的一步合成程序还报道了设计用于有机溶剂中的CuAAC反应的(OBn)和2d(OMe)。已在六种不同溶剂(水,己烷,甲苯,二氯甲烷,四氢呋喃和乙腈)中苯乙炔与苄基叠氮化物的反应中测试了整套配体(1a–d,2c–d),并进行了鉴定的1B,1C和2C的配位体描绘的最高耐受所考虑的家庭内的溶剂的极性的变化。配体1b–d和2c在小系列炔烃与叠氮化物在两种截然不同的反应介质中环加成反应中的比较性能(1:1)已经研究了叔丁基/
作者:Hyuntae Kang、Hyun Seok Jung、Jee Young Kim、Ji Chan Park、Mijong Kim、Hyunjoon Song、Kang Hyun Park
DOI:10.1166/jnn.2010.2530
日期:2010.10.1
An approach for gram-scale synthesis of uniform Cu2O nanocubes by a one-pot polyol process was used. The CuO hollow nanostructures were prepared by adding aqueous ammonia solutions with Cu2O nanocube colloidal solutions. CuO hollow nanospheres on acetylene black (CuO/AB), were synthesized and used for the catalytic [3+2] cycloaddition of azides with terminal alkynes to provide products in good yields with high regioselectivity. The CuO/AB was readily separated by centrifugation and could be reused ten times under the present reaction conditions without any loss of catalytic activity. Transition metals loaded onto acetylene black are useful reagents for a wide variety of organic transformations. Moreover, these heterogeneous systems are promising industrial catalysts.
Copper supported on MWCNT-guanidine acetic acid@Fe<sub>3</sub>O<sub>4</sub>: synthesis, characterization and application as a novel multi-task nanocatalyst for preparation of triazoles and bis(indolyl)methanes in water
transform-infrared. The catalytic activity of Cu/MWCNT-GAA@Fe3O4 was investigated in 1,3-dipolar cycloaddition and condensation reactions in water. The results showed a wide range of 1,2,3-triazoles and bis(indolyl)methanes were synthesized with good to excellent yields in a short time. The nanocatalyst could be recovered by applying an external magnetic field, which resulted in easy separation of the catalyst
报道了基于磁性胍乙酸(GAA)功能化的多壁碳纳米管(MWCNT)Cu / MWCNT-GAA @ Fe 3 O 4合成具有高度分散颗粒的新型负载型铜(Cu)纳米催化剂。通过X射线衍射,扫描电子显微镜,透射电子显微镜,能量色散X射线,元素分析(碳,氢,氮),热重分析和傅里叶变换红外光谱对合成的纳米催化剂进行表征。Cu / MWCNT-GAA @ Fe 3 O 4的催化活性在水中的1,3-偶极环加成和缩合反应中进行了研究。结果表明,在短时间内合成了范围广泛的1,2,3-三唑和双(吲哚基)甲烷,并具有良好或优异的收率。可以通过施加外部磁场来回收纳米催化剂,这使得无需过滤即可轻松分离催化剂,并且可以在不损失大量活性的情况下重复使用几次。
“Click Chemistry” in Zeolites: Copper(I) Zeolites as New Heterogeneous and Ligand-Free Catalysts for the Huisgen [3+2] Cycloaddition
作者:Stefan Chassaing、Abdelkarim Sani Souna Sido、Aurélien Alix、Mayilvasagam Kumarraja、Patrick Pale、Jean Sommer
DOI:10.1002/chem.200800479
日期:2008.7.28
For the first time, copper(I)-exchanged zeolites were developed as catalysts in organic synthesis. These solid materials proved to be versatile and efficientheterogeneous, ligand-free catalytic systems for the Huisgen [3+2] cycloaddition. These cheap and easy-to-prepare catalysts exhibited a wide scope and compatibility with functional groups. They are very simple to use, easy to remove (by filtration)