Ruthenium(ii) and osmium(ii) 1,2,3-triazolylidene organometallics: a preliminary investigation into the biological activity of ‘click’ carbene complexes
4-Organochalcogenoyl-1H-1,2,3-triazoles: synthesis and functionalization by a nickel-catalyzed Negishi cross-coupling reaction
摘要:
A general method for the synthesis of triazoles containing selenium and tellurium was accomplished via a CuCAAC reaction between organic azides and a terminal triple bond, generated by in situ deprotection of the silyl group. The reaction tolerates alkyl and arylazides, with alkyl and aryl substituents directly bonded to the chalcogen atom. The products were readily functionalized by a nickel-catalyzed Negishi cross-coupling reaction, furnishing the aryl-heteroaryl products at the 4-position in good yields. (C) 2012 Elsevier Ltd. All rights reserved.
We have developed an environmentally friendly and highly efficient method for copper-catalyzed cycloaddition of organic azides and terminal alkynes under solvent-free conditions. The protocol uses the cheap and easy-to-prepare Cu(PPh3)2NO3 complex as the catalyst.
Good to excellent yields of 1,4-disubstituted 1,2,3-triazoles were obtained within 2–25 min when the Cu(I)-catalyzed azide–alkyne cycloaddition (CuAAC) reaction was carried out under solvent-free conditions, with [Cu(phen)(PPh3)2]NO3 (1mol%) as the catalyst.
Cu(I)催化的叠氮化物-炔烃环加成(CuAAC)反应在无溶剂条件下进行,在2-25分钟内获得了1,4-二取代的1,2,3-三唑的良好至优异的产率。[Cu(phen)(PPh 3)2 ] NO 3(1mol%)作为催化剂。
Base-Induced Highly Regioselective Synthesis of <i>N</i><sup>2</sup>-Substituted 1,2,3-Triazoles under Mild Conditions in Air
作者:Jian Ji、Cong Guan、Qinghua Wei、Xuwen Chen、Yun Zhao、Shunying Liu
DOI:10.1021/acs.orglett.1c03743
日期:2022.1.14
We developed a highly regioselective base-induced synthesis of N2-substituted 1,2,3-triazoles from N-sulfonyl-1,2,3-triazoles and alkyl bromides/alkyl iodides at room temperature. We propose an SN2-like mechanistic pathway to explain the high N2-regioselectivity. The protocol features a broad substrate scope and generates products in good to excellent yields (72–90%).
我们开发了一种在室温下由N-磺酰基-1,2,3-三唑和烷基溴/烷基碘合成N 2 -取代的 1,2,3-三唑的高度区域选择性碱诱导合成。我们提出了一种类似 S N 2 的机制途径来解释高N 2区域选择性。该协议具有广泛的底物范围,并以良好的产量产生产品 (72–90%)。
Ruthenium-Catalyzed Alkenylation of Arenes with Alkynes or Alkenes by 1,2,3-Triazole-Directed C-H Activation
作者:Xing Guang Li、Kai Liu、Gang Zou、Pei Nian Liu
DOI:10.1002/ejoc.201402938
日期:2014.12
The ruthenium-catalyzedalkenylation of arenes with alkynes or alkenes has been achieved by using 1,2,3-triazole as the directing group for the C–Hactivation. With [Ru(p-cymene)Cl2]2 as the catalyst and Cu(OAc)2·H2O and AgSbF6 as additives, various triazole-substituted arenes reacted readily with a range of internal alkynes or terminal alkenes to afford di- or monoalkenylated arenes with high regioselectivity
Highly efficient click reaction on water catalyzed by a ruthenium complex
作者:Hai Xiao Siyang、Hui Ling Liu、Xin Yan Wu、Pei Nian Liu
DOI:10.1039/c4ra12960a
日期:——
The highlyefficient click reaction between terminal alkynes and azides has been achieved on water using rutheniumcomplex RuH2(CO)(PPh3)3 as the catalyst, and the catalyst loading was decreased to 0.2 mol% on water from 5 mol% in organic solvent. The RuH2(CO)(PPh3)3/H2O system also catalyzed the one-pot click reaction of bromides, sodium azide and alkynes; in this process, azides formed in situ and