scholarly journals Argentate(i) and (iii) complexes as intermediates in silver-mediated cross-coupling reactions

2018 ◽  
Vol 54 (40) ◽  
pp. 5086-5089 ◽  
Author(s):  
Sebastian Weske ◽  
Richard A. Hardin ◽  
Thomas Auth ◽  
Richard A. J. O’Hair ◽  
Konrad Koszinowski ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Esi Mass Spectrometry

Silver-mediated cross-coupling reactions proceed via anionic ate complexes, which have been characterized by a combination of NMR spectroscopy, ESI mass spectrometry, and quantum-chemical calculations.

Identification of a Higher‐Order Organozincate Intermediate Involved in Negishi Cross‐Coupling Reactions by Mass Spectrometry and NMR Spectroscopy

2011 ◽  
Vol 17 (28) ◽  
pp. 7845-7851 ◽  
Author(s):  
Howard N. Hunter ◽  
Niloufar Hadei ◽  
Voislav Blagojevic ◽  
Pascal Patschinski ◽  
George T. Achonduh ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Cross Coupling ◽  
Higher Order ◽  
Coupling Reactions ◽  
Cross Coupling Reactions

Improved Access to 1,8-Dichloro-10-(ethynyl)anthracene: A Useful Building Block for (Semi-)rigid Organic Frameworks

Synthesis ◽  
2018 ◽  
Vol 50 (10) ◽  
pp. 2009-2018
Author(s):  
Jan-Hendrik Lamm ◽  
Philipp Niermeier ◽  
Leif Körte ◽  
Beate Neumann ◽  
Hans-Georg Stammler ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Building Block ◽  
High Resolution Mass Spectrometry ◽  
Cross Coupling ◽  
Easy Access ◽  
Coupling Reactions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cross Coupling Reactions ◽  
Resolution Mass

An easy access to 1,8-dichloro-10-(ethynyl)anthracene is reported, which is widely applicable for building up rigid linkers between two 1,8-dichloroanthracene units. For this, 1,8-dichloroanthren-10(9H)-one was reacted with ethynylmagnesium bromide in the presence of CeCl3; the yield was 65%. This building block was used as a substrate in (cross-)coupling reactions and some examples of linked 1,8-dichloroanthracen-10-yls (e.g., 1,8-bis[(1,8-dichloroanthracen-10-yl)-ethynyl]naphthalene or 1,2-bis[(1,8-dichloroanthracen-10-yl)ethynyl]-benzene) were synthesized in good to moderate yields. Linked 1,8-dichloroanthracen-10-yl derivatives were also synthesized by cross-coupling reactions using 10-bromo-1,8-dichloroanthracene and doubly ethynyl-substituted substrates. Linkers between the 1,8-dichloroanthracene units were: butadiynediyl, dimethylsilyldiethynyl, octa-1,7-diyne-1,8-diyl, propane-1,3-diylbis(dimethylsilyl)diethynyl, benzene-1,2-diethynyl, naphthalene-1,8-diyldiethynyl, and anthracene-1,8-diyldiethynyl. The new anthracene compounds were characterized by NMR spectroscopy, high-resolution mass spectrometry, and, in part, by X-ray diffraction experiments.

scholarly journals Synthesis and X-ray Diffraction Study of thiosemicarbazone Palladacycles with dppm

Proceedings ◽  
2021 ◽  
Vol 62 (1) ◽  
pp. 13
Author(s):  
Marcos Rúa-Sueiro ◽  
Paula Munin-Cruz ◽  
Francisco Reigosa ◽  
José M. Vila ◽  
Juan M. Ortigueira
Keyword(s):  
Nmr Spectroscopy ◽  
31P Nmr ◽  
Antimicrobial Agents ◽  
Cross Coupling ◽  
31P Nmr Spectroscopy ◽  
Coupling Reactions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cross Coupling Reactions ◽  
Platinum Salt

Cyclometallated compounds have been extensively studied, in particular those with palladium and platinum. This is because of their possible applications in medicinal chemistry, as anticancer or antimicrobial agents; in some cases, with similar results as cisplatin, carboplatin or oxaliplatin. What is also remarkable is their use as homogeneous catalysts, for example, in cross coupling reactions such as Suzuki–Miyaura or Mizoroki–Heck. Herein, we report the synthesis of different thiosemicarbazone ligands, which will be reacted with a palladium or platinum salt, to give the corresponding cyclometallated compounds; in addition, their reactivity with bis(diphenylphosphino)methane (dppm) will be studied. Characterization has been carried out by elemental analysis, IR spectroscopy, 1H and 31P NMR spectroscopy. Additionally, 1c has been studied by X-ray diffraction.

scholarly journals Understanding the differences between iron and palladium in cross-coupling reactions

2019 ◽  
Vol 21 (19) ◽  
pp. 9651-9664 ◽  
Author(s):  
Xiaobo Sun ◽  
Marcus V. J. Rocha ◽  
Trevor A. Hamlin ◽  
Jordi Poater ◽  
F. Matthias Bickelhaupt
Keyword(s):  
Quantum Chemical ◽  
Bond Activation ◽  
Cross Coupling ◽  
Design Principles ◽  
Coupling Reactions ◽  
Chemical Analyses ◽  
Cross Coupling Reactions ◽  
Iron Based ◽  
Iron Based Catalysts

We aim at developing design principles, based on quantum chemical analyses, for a novel type of iron-based catalysts that mimic the behavior of their well-known palladium analogs in the bond activation step of cross coupling reactions.

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