Continuous-flow azide–alkyne cycloadditions with an effective bimetallic catalyst and a simple scavenger system
作者:Sándor B. Ötvös、Gábor Hatoss、Ádám Georgiádes、Szabolcs Kovács、István M. Mándity、Zoltán Novák、Ferenc Fülöp
DOI:10.1039/c4ra07954j
日期:——
A continuous-flow technique was utilized for azide–alkyne cycloadditions catalyzed by copper on iron bimetallic system. An iron powder unit was used as a readily available copper scavenger, which turned into an in situ generated copper catalyst after several hours of continuous operation.
Highly active copper-catalysts for azide-alkynecycloaddition
作者:Zsombor Gonda、Zoltán Novák
DOI:10.1039/b920790m
日期:——
Bis-triphenylphosphano complexes of copper(I)-carboxylates serve as efficient catalysts for azide-alkyne cycloaddition. The triazole formation takes place straightforwardly at ambient temperature providing a wide variety of products with good yields in the presence of 0.005–0.05% catalyst.
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/
Copper on Iron: Catalyst and Scavenger for Azide–Alkyne Cycloaddition
homogeneous copper complexes. Iron not only behaves as support for copper, but acts as a redox scavenger, and reduces the copper contamination of the organic product. Dipolar cycloaddition of terminal alkynes and azides catalyzed by the Cu/Fe bimetallic system is reported. In the presence of a readily accessible nanosized copper source, the cycloaddition reaction can be easily achieved at ambient temperature
1-D copper(I) coordination polymer based on bidentate 1,3-dithioether ligand: Novel catalyst for azide-alkyne-cycloaddition (AAC) reaction
作者:Sankar Saha、Kinkar Biswas、Basudeb Basu
DOI:10.1016/j.tetlet.2018.05.040
日期:2018.6
A novel 1,3-bis(4-fluorophenylthio)-propane ligand based CuI 1-D polymeric coordination complex having formula ([(CuI)2ArS(CH2)3SAr}2]n, Ar = 4-F-C6H4) has been synthesized and characterized by 1H NMR, 13C NMR and single crystal XRD techniques. This complex has been employed for the first time as suitable catalyst for base-free one-pot three-component regioselective azide-alkyne cycloaddition (AAC)
基于式([(CuI)2 ArS(CH 2)3 SAr} 2 ] n,Ar = 4-FC 6的新型的1,3-双(4-氟苯硫基)丙烷配体的CuI 1-D聚合物配位络合物H 4)已经合成并通过1 H NMR,13 C NMR和单晶XRD技术表征。该络合物首次用作无碱单锅三组分区域选择性叠氮化物-炔烃环加成(AAC)反应的合适催化剂。还使用我们的催化体系通过一锅两步反应以多组分方式制备了具有硫官能化侧链的新型1,2,3-三唑化合物。