ChemInform Abstract: Ligand-Free PdCl2-Catalyzed Heck Reaction of Arylboronic Acids and Olefins under Reusable TBAB/H2O Conditions.

ChemInform ◽  
2014 ◽  
Vol 45 (13) ◽  
pp. no-no
Author(s):  
Bo-Xiao Tang ◽  
Xiao-Niu Fang ◽  
Ren-Yun Kuang ◽  
Rong-Hua Hu ◽  
Ji-Wei Wang ◽  
...  
Keyword(s):  
Heck Reaction ◽  
Arylboronic Acids ◽  
Ligand Free

Ligand-Free Palladium-Catalysed Oxidative Heck Reaction of 4-Vinylpyridine with Arylboronic Acids: Selective Synthesis of (E)-4-Styrylpyridines

2012 ◽  
Vol 36 (6) ◽  
pp. 322-325 ◽  
Author(s):  
Chuanli Shi ◽  
Jinchang Ding ◽  
Jun Jiang ◽  
Jiuxi Chen ◽  
Huayue Wu ◽  
...  
Keyword(s):  
Heck Reaction ◽  
Selective Synthesis ◽  
Arylboronic Acids ◽  
Ligand Free

Ligand-Free PdCl2-Catalyzed Heck Reaction of Arylboronic Acids and Olefins under Reusable TBAB/H2O Conditions

Synthesis ◽  
2013 ◽  
Vol 45 (21) ◽  
pp. 2971-2976 ◽  
Author(s):  
Bo-Xiao Tang ◽  
Xiao-Niu Fang ◽  
Ren-Yun Kuang ◽  
Rong-Hua Hu ◽  
Ji-Wei Wang ◽  
...  
Keyword(s):  
Heck Reaction ◽  
Arylboronic Acids ◽  
Ligand Free

Triethanolamine‐Mediated Magnetically Separable Fe 3 O 4 −Pd Nanoparticles Catalyzed Heck Reaction under Ligand‐Free Conditions

2021 ◽  
Vol 6 (31) ◽  
pp. 7944-7949
Author(s):  
Chandan Kumar Pal ◽  
Ashis Kumar Jena ◽  
Dibya Das ◽  
Swagatika Sahu ◽  
Rajesh Kumar Singh
Keyword(s):  
Heck Reaction ◽  
Pd Nanoparticles ◽  
Ligand Free ◽  
Magnetically Separable

scholarly journals Autocatalytic photoredox Chan-Lam coupling of free diaryl sulfoximines with arylboronic acids

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Cong Wang ◽  
Hui Zhang ◽  
Lucille A. Wells ◽  
Tian Liu ◽  
Tingting Meng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Atom Abstraction ◽  
Coupling Reactions ◽  
Ambient Light ◽  
Environmental Friendliness ◽  
Copper Species ◽  
Arylboronic Acids ◽  
Ligand Free ◽  
Byproduct Formation ◽  
Electron Reduction

AbstractN-Arylation of NH-sulfoximines represents an appealing approach to access N-aryl sulfoximines, but has not been successfully applied to NH-diaryl sulfoximines. Herein, a copper-catalyzed photoredox dehydrogenative Chan-Lam coupling of free diaryl sulfoximines and arylboronic acids is described. This neutral and ligand-free coupling is initiated by ambient light-induced copper-catalyzed single-electron reduction of NH-sulfoximines. This electron transfer route circumvents the sacrificial oxidant employed in traditional Chan-Lam coupling reactions, increasing the environmental friendliness of this process. Instead, dihydrogen gas forms as a byproduct of this reaction. Mechanistic investigations also reveal a unique autocatalysis process. The C–N coupling products, N-arylated sulfoximines, serve as ligands along with NH-sulfoximine to bind to the copper species, generating the photocatalyst. DFT calculations reveal that both the NH-sulfoximine substrate and the N-aryl product can ligate the copper accounting for the observed autocatalysis. Two energetically viable stepwise pathways were located wherein the copper facilitates hydrogen atom abstraction from the NH-sulfoximine and the ethanol solvent to produce dihydrogen. The protocol described herein represents an appealing alternative strategy to the classic oxidative Chan-Lam reaction, allowing greater substrate generality as well as the elimination of byproduct formation from oxidants.

ChemInform Abstract: Base Promoted Highly Efficient Copper Fluorapatite Catalyzed Coupling of Phenols with Arylboronic Acids under Mild and Ligand-Free Conditions.

ChemInform ◽  
2013 ◽  
Vol 44 (16) ◽  
pp. no-no
Author(s):  
Shafeek A. R. Mulla ◽  
Suleman M. Inamdar ◽  
Mohsinkhan Y. Pathan ◽  
Santosh S. Chavan
Keyword(s):  
Arylboronic Acids ◽  
Highly Efficient ◽  
Ligand Free
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