Site-Selective N-Dealkylation of 1,2,3-Triazolium Salts: A Metal-Free Route to 1,5-Substituted 1,2,3-Triazoles and Related Bistriazoles
作者:Zaira Monasterio、Aitziber Irastorza、José I. Miranda、Jesus M. Aizpurua
DOI:10.1021/acs.orglett.6b01177
日期:2016.5.20
carrying latent “click” functionality, followed by a nucleophile-promoted N1-dealkylation of the resulting strongly electrophilic intermediate triazolium salts, provides an efficient route to 1,5-disubstituted 1,2,3-triazoles. The azide and alkyne groups incorporated by N-alkylation can be submitted to further copper-catalyzedazide–alkyne and Huisgen cycloadditions to provide bis(1,2,3-triazoles)
efficient catalytic system, CuSO4·5H2O/1-(4-methoxyphenyl)-3-phenylthiourea, for the copper(I)-catalyzed azide–alkyne cycloaddition reaction (CuAAC) was discovered. In the above catalytic system, substitutedthiourea acts both as a reductant and a ligand. CuSO4·5H2O/1-(4-methoxyphenyl)-3-phenylthiourea is both an economical and efficient catalyst for the CuAAC reaction. In addition, the new catalytic system
发现了一种高效的催化体系CuSO 4 ·5H 2 O / 1-(4-甲氧基苯基)-3-苯基硫脲,用于铜(I)催化的叠氮化物-炔烃环加成反应(CuAAC)。在上述催化体系中,取代的硫脲既充当还原剂又充当配体。CuSO 4 ·5H 2 O / 1-(4-甲氧基苯基)-3-苯基硫脲是CuAAC反应的经济有效的催化剂。此外,新的催化系统具有有利的功能,包括温和的绿色反应条件以及广泛的底物相容性。用CuSO 4 ·5H 2制备了各种具有良好产率的1,4-二取代的1,2,3-三唑O / 1-(4-甲氧基苯基)-3-苯基硫脲在水溶液中的催化体系。
Zeo-click synthesis: CuI-zeolite-catalyzed one-pot two-step synthesis of triazoles from halides and related compounds
作者:Valérie Bénéteau、Andrea Olmos、Thirupathi Boningari、Jean Sommer、Patrick Pale
DOI:10.1016/j.tetlet.2010.05.036
日期:2010.7
CuI-zeolites proved to be an efficient heterogeneous catalyst for the one-pottwo-stepsynthesis of triazoles from halides or tosylates, sodium azide, and alkynes. The step and atom economies of this cascade reaction as well as water used as solvent and catalyst recycling make such synthesis a trully green process. With selected substrates, the peculiar roles of CuI-zeolites as catalysts were highlighted
CuI nanoparticles on modified poly(styrene-co-maleic anhydride) as an effective catalyst in regioselective synthesis of 1,2,3-triazoles via click reaction: a joint experimental and computational study
作者:Tahmineh Baie Lashaki、Hossein A. Oskooie、Tayebeh Hosseinnejad、Majid M. Heravi
DOI:10.1080/00958972.2017.1321742
日期:2017.6.3
approaches for different coordination modes. Encouraged by our computational results, this new catalyst was employed in a one-pot, three-componentreaction involving terminal alkynes, alkyl halides and sodium azide in water resulting in highly regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles in high to excellent yields. The catalyst was reused without pre-activation and recycled for at least five
摘要 实现了 CuI 纳米粒子 (NPs) 在改性聚(苯乙烯-共-马来酸酐)[SMA] 上的原位固定。通过扫描电子显微镜 (SEM)、能量色散 X 射线分析 (EDAX) 和电感耦合等离子体 (ICP) 证实了 CuI 在制备的载体上的正确固定。为了定量描述 CuI/SMI 纳米催化剂的实验特征,计算评估了 Cu(I) 离子与改性 SMI 配体在气相和溶液相之间的配位行为和相互作用的性质。在这条线上,通过密度泛函理论(DFT)和分子中原子的量子理论(QTAIM)方法对不同配位模式的电子密度函数的数学性质进行了拓扑计算和分析。受到我们计算结果的鼓舞,这种新催化剂用于一锅三组分反应,包括末端炔烃、卤代烷和叠氮化钠在水中的高度区域选择性合成 1,4-二取代的 1,2,3-三唑,收率很高。催化剂在没有预活化的情况下重复使用并循环使用至少五次,没有观察到其活性的显着降低。
Greener and Expeditious Synthesis of 1,4-Disubstituted 1,2,3-Triazoles from Terminal Acetylenes and in situ Generated α-Azido Ketones
作者:Dalip Kumar、Gautam Patel、V. Reddy
DOI:10.1055/s-0028-1087556
日期:2009.2
A convenient and mild protocol for the one-pot regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles in aqueous PEG 400 has been reported. The methodology involves the one-pot reaction ofa-bromo ketones, sodium azide, and terminal acetylenes catalyzed by Cu(I) in aqueous PEG 400 at room temperature. Prominent features of our approach are mild reaction conditions, use of readily available α-bromo