Gold(<scp>i</scp>)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes
作者:Manjur O. Akram、Popat S. Shinde、Chetan C. Chintawar、Nitin T. Patil
DOI:10.1039/c8ob00630j
日期:——
Gold(I)-catalyzed cross-couplingreactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium
描述了金(I)催化的芳基重氮盐与有机锡烷的交叉偶联反应。这种氧化还原中性策略为各种联芳基,乙烯基芳烃和芳基乙炔提供了一种有效的方法。用NMR和ESI-MS监测反应为原位形成Ph 3 PAu I R(R =芳基,乙烯基和炔基)物种提供了有力证据,这对于激活芳基重氮盐至关重要。
One-Pot Copper-Catalyzed Three-Component Reaction of Sulfonyl Azides, Alkynes, and Allylamines To Access 2,3-Dihydro-1H-imidazo[1,2-a]indoles
作者:Bingwei Zhou、Yunkui Liu、Hongwei Jin、Daohong Liu
DOI:10.1055/s-0037-1610739
日期:2020.5
A copper-catalyzed multicomponent reaction of sulfonylazides, alkynes, and allylamines affording 2,3-dihydro-1H-imidazo-[1,2-a]indoles in moderate yields is reported. Four C–N bonds are constructed by way of azide-alkyne cycloaddition (CuAAC) and double Ullmann-type coupling reactions in a one-pot process.
Gold Vinylidene Complexes: Intermolecular C(sp<sup>3</sup>)H Insertions and Cyclopropanations Pathways
作者:A. Stephen K. Hashmi、Marcel Wieteck、Ingo Braun、Matthias Rudolph、Frank Rominger
DOI:10.1002/anie.201204015
日期:2012.10.15
Highly reactive gold vinylidenespecies are used for intermolecular C(sp3)H insertions into unactivated alkanes (see scheme). In addition, they can be regarded as synthons for alkylidene carbenes. Initiated by cyclopropanation of the vinylidenespecies/alkylidene carbenoide, cyclobutene derivatives are formed in a diastereoselective fashion by a ring‐enlargement cascade in only one step.
<b>Hydrohydrazination of Arylalkynes Catalyzed by an Expanded Ring N-Heterocyclic Carbene (er-NHC) Gold Complex Under Solvent-Free Conditions</b>
作者:Oleg S. Morozov、Pavel S. Gribanov、Andrey F. Asachenko、Pavel V. Dorovatovskii、Victor N. Khrustalev、Viktor B. Rybakov、Mikhail S. Nechaev
DOI:10.1002/adsc.201500658
日期:2016.4.28
electron donating, sterically bulky THD‐Dipp (1,3‐bis(2,6‐diisopropylphenyl)hexahydro‐2H‐1,3‐diazepine‐2‐ylidene) seven‐membered N‐heterocyclic carbene ligand, efficiently promotes intermolecular addition of Ts‐ and Boc‐hydrazine to arylalkynes undersolvent‐freeconditions.
[(THD-Dipp)AuOTf],受强电子给体,空间庞大的THD-Dipp(1,3-二(2,6-二异丙基苯基)六氢-2 H -1,3-二氮杂-2-亚基)的支持7 N元杂环卡宾配体可在无溶剂条件下有效促进Ts和Boc肼分子间加成至芳炔基。
Palladium‐Catalyzed Annulation of Aryltriazoles and Arylisoxazoles with Alkynes
作者:Hairui Yuan、Min Wang、Zhenghu Xu、Hongyin Gao
DOI:10.1002/adsc.201900435
日期:2019.9.17
We developed herein a palladium‐catalyzedannulation of aryltriazoles and arylisoxazoles with internal alkynes via C−H bond activation process. 4,5‐disubstituted‐3H‐naphtho[1,2‐d][1,2,3]triazoles and 4,5‐disubstituted‐naphtho[2,1‐d]isoxazoles could be afforded in good yields, respectively. The starting materials are readily available and the scope and applications of this transformation were explored
我们在本文中开发了通过CH键活化过程与内部炔烃进行钯催化的芳基三唑和芳基异恶唑的环化反应。可以分别获得4,5-二取代-3 H-萘[1,2- d ] [1,2,3]三唑和4,5-二取代-萘[2,1- d ]异恶唑。起始材料容易获得,并探讨了这种转化的范围和应用。该反应为萘稠合的杂环提供了一种实用的方法。