Copper-Catalyzed Decarboxylative/Click Cascade Reaction: Regioselective Assembly of 5-Selenotriazole Anticancer Agents
摘要:
A simple and efficient Cu-catalyzed decarboxylative/click reaction for the preparation of 1,4-disubstituted 5-arylselanyl-1,2,3-triazoles from propiolic acids, diselenides, and azides has been developed. The mechanistic study revealed that the intermolecular AAC reaction of an alkynyl selenium intermediate occurred. The resulting multisubstituted 5-seleno-1,2,3-triazoles were tested for in vitro anticancer activity by MTT assay, and compounds 4f, 4h, and 4p showed potent cancer cell-growth inhibition activities.
Copper-polymer nanocomposite: An efficient catalyst for green Huisgen click synthesis
作者:Alexander V. Zuraev、Yuri V. Grigoriev、Vladislav A. Budevich、Oleg A. Ivashkevich
DOI:10.1016/j.tetlet.2018.03.028
日期:2018.4
A new method for Huisgen [3+2] cycloadditionsynthesis of 1,4- and 1,4,5-substituted-1H-1,2,3-triazoles was reported. The reaction was catalyzed by the product of thermolysis of copper (II) poly-5-vinyltetrazolate. Heterogeneous catalyst includes copper nanoparticles which supported on polymeric matrix. It presents recovered and recycled catalyst and the catalyzed reaction proceeds in aerobic conditions
报道了一种新的Huisgen [3 + 2]环加成合成1,4-和1,4,5-取代的-1 H -1,2,3-三唑的新方法。该反应由聚(5-乙烯基四唑酸铜)铜(II)的热解产物催化。非均相催化剂包括负载在聚合物基质上的铜纳米颗粒。它提供了回收和再循环的催化剂,催化反应在需氧条件下于室温在水性介质中进行。
A New Multicomponent Multicatalyst Reaction (MC)<sup>2</sup>R: Chemoselective Cycloaddition and Latent Catalyst Activation for the Synthesis of Fully Substituted 1,2,3-Triazoles
A multicomponent multicatalyst reaction (MC)2R for constructing fully substituted1,2,3-triazoles is reported. An application of chemoselectivity and latent catalysis in a sequence of multicatalytic reactions confers control over a number of undesired processes, where all of the reagents coexist in the same reaction vessel. The sequence of a chemoselective copper-catalyzed azide alkyne cycloaddition
Multi-component syntheses of diverse 5-fluoroalkyl-1,2,3-triazoles facilitated by air oxidation and copper catalysis
作者:Anlian Zhu、Xiaofang Xing、Shilei Wang、Donghe Yuan、Gongming Zhu、Mingwei Geng、Yuanyang Guo、Guisheng Zhang、Lingjun Li
DOI:10.1039/c9gc00647h
日期:——
synthesized from available fluoroalkyl reagents, terminal alkynes and organic azides via one-pot reactions. Air was used as the sole oxidant; this significantly reduced the cost of this transformation, and the resulting operations and work-up procedures were significantly simplified. Alkyl azides and alkynes bearing various functional groups and natural structural motifs, and even aryl azides, which were
空气是一种理想的氧化剂,因为它的含量丰富,成本低廉且没有有毒的副产物。然而,由于其活性降低和选择性差,使用空气作为氧化剂的催化好氧氧化反应仍然具有挑战性。在这项研究中,成功合成了一类新的甘氨酰胺型配体,并通过亲核性氟烷基试剂原位捕获形成的三唑化物,用于需氧氧化反应。通过这个设计过程的氧化,各种5-氟代-1,2,3-三唑可以从可用的氟代试剂,末端炔烃和有机叠氮化物的合成通过一锅反应。空气被用作唯一的氧化剂。这显着降低了这种转换的成本,并且显着简化了所产生的操作和后处理程序。带有各种官能团和天然结构基序的烷基叠氮化物和炔烃,甚至在其他报道的方法中无效的芳基叠氮化物,在当前条件下均能有效反应。可以有效地使用不同的氟代烷基试剂,包括三氟甲基三甲基硅烷(CF 3 TMS),五氟乙基三甲基硅烷(C 2 F 5 TMS)和七氟丙基三甲基硅烷(C 3 F 7 TMS)。机理研究进一步表明,新的N,O配
Cu(II)-Catalyzed Oxidative Formation of 5,5′-Bistriazoles
作者:Christopher J. Brassard、Xiaoguang Zhang、Christopher R. Brewer、Peiye Liu、Ronald J. Clark、Lei Zhu
DOI:10.1021/acs.joc.6b01907
日期:2016.12.16
Copper(II) acetate under aerobic conditions catalyzes the formation of 5,5′-bis(1,2,3-triazole)s (5,5′-bistriazoles) from organic azides and terminal alkynes. This reaction is an oxidative extension of the widely used copper-catalyzed azide–alkyne “click” cycloaddition. The inclusion of potassium carbonate as an additive and methanol or ethanol as the solvent, and in many instances an atmosphere of
synthetic protocol has been developed for the controllable preparation of bis(1,2,3-triazole)s and 5-alkynyl-1,2,3-triazoles from alkyne and azide under different temperatures. Various azides and alkynes were used as substrates for the reactions and the successful applications in nucleoside analogues manifested the values of this method in syntheses of bioactive molecules. Besides, a possible temperature-guided