TBAI-catalyzed oxidative C–H functionalization: a new route to benzo[b]phosphole oxides

2016 ◽  
Vol 52 (13) ◽  
pp. 2815-2818 ◽  
Author(s):  
Yun Zhang ◽  
Gaobo Hu ◽  
Dumei Ma ◽  
Pengxiang Xu ◽  
Yuxing Gao ◽  
...  
Keyword(s):  
Radical Addition ◽  
Phosphine Oxides ◽  
Metal Free ◽  
One Step

The first metal-free, efficient TBAI-catalyzed radical addition/cyclization of diaryl(arylethynyl)phosphine oxides with toluene derivatives has been developed, affording a general, one-step approach to structurally sophisticated benzo[b]phosphole oxides via sequential C–H functionalization along with the formation of two new C–C bonds.

A metal-free radical cascade reaction of phosphine oxides with 2-aryloxy phenylacetylenes to assemble diphosphonyl xanthene derivatives

2021 ◽  
Author(s):  
Tao Fan ◽  
Yan Liu ◽  
Caina Jiang ◽  
Yanli Xu ◽  
Yan-Yan Chen
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Cascade Reaction ◽  
Phosphine Oxides ◽  
Metal Free ◽  
Mild Conditions ◽  
Xanthene Derivatives ◽  
Reaction Proceeds ◽  
Radical Cascade

A radical cascade reaction of 2-aryloxy phenylacetylene with phosphine oxides promoted by K2S2O8 was developed, provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with...

One-step Synthesis of Amorphous Nickel Iron Phosphide Hierarchical Nanostructures for Water Electrolysis with Superb Stability at High Current Density

2021 ◽  
Author(s):  
Yuefeng Yu ◽  
Xun He ◽  
Rong Li ◽  
Xinglong Gou
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Water Electrolysis ◽  
Bifunctional Catalysts ◽  
High Current ◽  
Hierarchical Nanostructures ◽  
Iron Phosphide ◽  
Nickel Iron ◽  
Metal Free ◽  
One Step

Development of noble-metal-free high-performance bifunctional catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential but challenging for hydrogen production from water electrolysis. Herein, amorphous bimetallic...

K2S2O8-mediated metal-free direct P–H/C–H functionalization: a convenient route to benzo[b]phosphole oxides from unactivated alkynes

2016 ◽  
Vol 18 (12) ◽  
pp. 3522-3526 ◽  
Author(s):  
Dumei Ma ◽  
Weizhu Chen ◽  
Gaobo Hu ◽  
Yun Zhang ◽  
Yuxing Gao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Radical Addition ◽  
Metal Free ◽  
Internal Alkynes ◽  
Convenient Route

A metal-free and K2S2O8-mediated radical addition/cyclization of internal alkynes leading to benzo[b]phosphole oxides was developed, which eliminates residual heavy metal contamination in the product.

A Metal-free and β-Stereoselective Synthesis of 2-Deoxy-C-aryl Glycosides: Synthesis of 5-aza analogues of Aquayamycin

Synlett ◽  
2021 ◽  
Author(s):  
Yuling Mei ◽  
nan jiang ◽  
Yu Yang ◽  
Wan Zhang ◽  
Saifeng Qiu ◽  
...  
Keyword(s):  
Stereoselective Synthesis ◽  
Metal Free ◽  
Wide Range ◽  
One Step ◽  
Aryl Glycosides ◽  
Aryl Glycoside

A convenient protocol for β-stereoselective synthesis of 2-deoxy-C-aryl glycosides has been developed. This reaction takes place in one step by using I2/Et3SiH to activate glycosyl acetate to generate glycosyl iodide intermediate in situ, which was captured by naphthol followed by Fries-like O- → C-glycoside rearrangement to selectively afford β-C-aryl glycoside. The approach is applicable to a wide range of naphthol modules, and its utility was demonstrated in the synthesis of 5-aza analogues of Aquayamycin.

N-Chloroamines as substrates for metal-free photochemical atom-transfer radical addition reactions in continuous flow

2021 ◽  
Author(s):  
Alexander Steiner ◽  
Oscar de Frutos ◽  
Juan A. Rincón ◽  
Carlos Mateos ◽  
Jason Williams ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Radical Addition ◽  
Addition Reactions ◽  
Atom Transfer ◽  
Metal Free ◽  
Atom Transfer Radical Addition

N-Chloroamines have recently seen interest as substrates for atom-transfer radical addition (ATRA) reactions with olefins, to form β-chloroamine products, with complete atom incorporation. We report the development of a fully...

Three-component 3-(phosphoryl)methylindole synthesis from indoles, H-phosphine oxides and carbonyl compounds under metal-free conditions

2019 ◽  
Vol 21 (4) ◽  
pp. 792-797 ◽  
Author(s):  
Jiaoting Pan ◽  
Runmin Zhao ◽  
Jiami Guo ◽  
Dumei Ma ◽  
Ying Xia ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Indole Derivatives ◽  
Phosphine Oxides ◽  
One Pot ◽  
Metal Free ◽  
Three Component Reaction ◽  
Acid Catalyzed

The first facile and efficient acid-catalyzed three-component reaction of indoles, H-phosphine oxides and carbonyl compounds has been developed, providing a general, one-pot approach to structurally diverse C3-alkylated indole derivatives.

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