利用以DMSO- d 6为氘源的碱催化,开发了一种高效便捷的氘标记的1,2,3-三唑。通过预先合成的原始1,2,3-三唑的氢-氘交换反应,可以制得一系列带有各种取代基的氘代1,2,3-三唑,具有很高的氘化率和高收率。催化系统已成功扩展到碘官能化的1,2,3-三唑基衍生物的脱卤和卤素-氘交换过程。这项研究为未来开发含1,2,3-三唑基的有机衍生物,聚合物材料和生物医学分子奠定了有希望的基础。
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。
An Organocatalytic Azide-Aldehyde [3+2] Cycloaddition: High-Yielding Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles
作者:Dhevalapally B. Ramachary、Adluri B. Shashank、S. Karthik
DOI:10.1002/anie.201406721
日期:2014.9.22
An organocatalyticazide–aldehyde [3+2] cycloaddition (organo‐click) reaction of a variety of enolizable aldehydes is reported. The organo‐click reaction is characterized by a high rate and regioselectivity, mild reaction conditions, easily available substrates with simple operation, and excellent yields with a broad spectrum of substrates. It constitutes an alternative to the previously known CuAAC
NNNifty targets: In a straightforward copper‐mediated synthesis of 1,4‐disubstituted and 1,4,5‐trisubstituted 1,2,3‐triazoles, readily available aniline and N‐tosylhydrazone substrates underwent cyclization through CN and NN bond formation (see scheme; Piv=pivaloyl, Ts=p‐toluenesulfonyl). This method enables the preparation of 1,2,3‐triazoles with high efficiency under mild conditions without the
Magnetically Recoverable CuFe<sub>2</sub>O<sub>4</sub>Nanoparticles: Catalyzed Synthesis of Aryl Azides and 1,4-Diaryl-1,2,3-triazoles from Boronic Acids in Water
Magneticallyrecoverable and reusable CuFe2O4 nanoparticles are shown to be highly efficient catalysts for the one-pot synthesis of biologically important 1,4-diaryl-1,2,3-triazoles starting fromboronicacids, sodium azide, and acetylenes. The use of aqueous reaction medium at room temperature, the low cost and facile recovery of the catalyst by application of an external magnetic field, and consistently
An Efficient Copper-Catalyzed One-Pot Synthesis of 1-Aryl-1,2,3-triazoles from Arylboronic Acids in Water under Mild Conditions
作者:Changbo Hao、Changjian Zhou、Jianwei Xie、Jie Zhang、Ping Liu、Bin Dai
DOI:10.1002/cjoc.201500643
日期:2015.11
A convenient method for one‐pot two‐step 1,3‐dipolar cycloadditon reaction of arylboronic acid, sodium azide followed with terminal alkynes in the presence of 2‐pyrrolecarbaldiminato‐Cu(II) complexes catalyst is reported. Various 1‐aryl‐1,2,3‐triazoles were prepared in 63%–97% yields in water at 30°C without any additives and avoiding the isolation of unstable aryl azides.