Copper(II) Nitrate Catalyzed Azide–Alkyne Cycloaddition Reaction: Study the Effect of Counter Ion, Role of Ligands and Catalyst Structure
作者:Manisha Bihani、Bala G. Pasupuleti、Pranjal P. Bora、Ghanashyam Bez、Ram A. Lal
DOI:10.1007/s10562-018-2357-9
日期:2018.5
For the first time, CuAAC reaction catalyzed by copper(II) nitrate and counter ion effect of various copper(II) salts are reported. Use of a novel copper complex 1, derived from the reaction of copper(II) nitrate with 5-acetyl-2-amino-6-methyl-4-(pyridin-3-yl)-4H-pyran-3-carbonitrile, facilitated the CuAAC reaction at room temperature with a catalyst loading as low as 1 mol% within a very short reaction
首次报道了硝酸铜(II)催化的CuAAC反应和各种铜(II)盐的反离子效应。使用源自硝酸铜 (II) 与 5-乙酰基-2-氨基-6-甲基-4-(吡啶-3-基)-4H-吡喃-3-甲腈反应的新型铜络合物 1,促进室温下的 CuAAC 反应,催化剂负载量低至 1 mol%,反应时间很短。
A practical flow synthesis of 1,2,3-triazoles
作者:Dawid Drelinkiewicz、Richard J. Whitby
DOI:10.1039/d2ra04727f
日期:——
A robust and versatile protocol for synthesis of 1-monosubstituted and 1,4-disubstituted 1H-1,2,3-triazoles was established under continuous flow conditions using copper-on-charcoal as a heterogeneous catalyst. This methodology allowed for the synthesis of a diverse set of substituted1,2,3-triazoles with good functional group tolerance and high yields. 2-Ynoic acids were also used as small-chain alkyne
在连续流动条件下,使用铜-炭作为非均相催化剂,建立了一种用于合成 1-单取代和 1,4-二取代 1 H -1,2,3-三唑的稳健且通用的方案。该方法允许合成具有良好官能团耐受性和高产率的多种取代的 1,2,3-三唑。2-Ynoic酸也被用作脱羧/环加成级联中的小链炔烃供体,允许绕过气态试剂,以高产率提供所需的三唑。所开发的方法用于合成一种抗癫痫剂 Rufinamide,其分离产率为 96%。
Click Chemistry: An Efficient Synthesis of Heterocycles Substituted with Steroids, Saponins, and Digitalis Analogues
partner allowed the synthesis of a privileged class of natural product analogues. The versatility of this protocol makes this chemistry a useful attractive approach for the synthesis of target molecules. click chemistry - 1,2,3-triazole - sugars - steroids - saponins - digitalis