Pyridinium Salts as Redox‐Active Functional Group Transfer Reagents

2020 ◽  
Vol 59 (24) ◽  
pp. 9264-9280 ◽  
Author(s):  
Simon L. Rössler ◽  
Benson J. Jelier ◽  
Emmanuel Magnier ◽  
Guillaume Dagousset ◽  
Erick M. Carreira ◽  
...  
Keyword(s):  
Functional Group ◽  
Pyridinium Salts ◽  
Group Transfer ◽  
Active Functional Group ◽  
Redox Active

scholarly journals Semiconducting polymer dots with monofunctional groups

2014 ◽  
Vol 50 (42) ◽  
pp. 5604-5607 ◽  
Author(s):  
Fangmao Ye ◽  
Changfeng Wu ◽  
Wei Sun ◽  
Jiangbo Yu ◽  
Xuanjun Zhang ◽  
...  
Keyword(s):  
Functional Group ◽  
Semiconducting Polymer ◽  
Active Functional Group ◽  
Polymer Dots ◽  
Semiconducting Polymer Dots

This communication describes an approach for preparing monovalent semiconducting polymer dots (mPdots) where each mPdot was composed of a single active functional group.

scholarly journals Methyl Radical Initiated Kharasch and Related Reactions

2020 ◽  
Author(s):  
Nicholas Tappin ◽  
Philippe Renaud
Keyword(s):  
Halogen Atom ◽  
Functional Group ◽  
Chain Process ◽  
Methyl Radicals ◽  
Methyl Radical ◽  
Reaction Conditions ◽  
Alternative Source ◽  
Group Transfer ◽  
Radical Trap ◽  
Flash Column Chromatography

An improved procedure to run halogen atom and related chalcogen group transfer radical additions is reported. The procedure relies on the thermal decomposition of di-<i>tert</i>-butylhyponitrite (DTBHN), a safer alternative to the explosive diacetyl peroxide, to produce highly reactive methyl radicals that can initiate the chain process. This mode of initiation generates byproducts that are either gaseous (N<sub>2</sub>) or volatile (acetone and methyl halide) thereby facilitating greatly product purification by either flash column chromatography or distillation. In addition, remarkably simple and mild reaction conditions (refluxing EtOAc during 30 minutes under normal atmosphere) and a low excess of the radical precursor reagent (2.0 equivalents) make this protocol particularly attractive for preparative synthetic applications. This initiation procedure has been demonstrated with a broad scope since it works efficiently to add a range of electrophilic radicals generated from iodides, bromides, selenides and xanthates over a range of unactivated terminal alkenes. A diverse set of radical trap substrates exemplifies a broad functional group tolerance. Finally, di-<i>tert</i>-butyl peroxyoxalate (DTBPO) is also demonstrated as alternative source of <i>tert-</i>butoxyl radicals to initiate these reactions under identical conditions which gives gaseous byproducts (CO<sub>2</sub>).

scholarly journals A DNA-mimic contact-active functional group for antifouling ultrafiltration membranes

Chemosphere ◽  
2019 ◽  
Vol 216 ◽  
pp. 669-676
Author(s):  
Xinbo Wang ◽  
Hong Cheng ◽  
Peiying Hong ◽  
Xixiang Zhang ◽  
Zhiping Lai
Keyword(s):  
Functional Group ◽  
Ultrafiltration Membranes ◽  
Active Functional Group

scholarly journals Methyl Radical Initiated Kharasch and Related Reactions

2020 ◽  
Author(s):  
Nicholas Tappin ◽  
Philippe Renaud
Keyword(s):  
Halogen Atom ◽  
Functional Group ◽  
Chain Process ◽  
Methyl Radicals ◽  
Methyl Radical ◽  
Reaction Conditions ◽  
Alternative Source ◽  
Group Transfer ◽  
Radical Trap ◽  
Flash Column Chromatography

An improved procedure to run halogen atom and related chalcogen group transfer radical additions is reported. The procedure relies on the thermal decomposition of di-<i>tert</i>-butylhyponitrite (DTBHN), a safer alternative to the explosive diacetyl peroxide, to produce highly reactive methyl radicals that can initiate the chain process. This mode of initiation generates byproducts that are either gaseous (N<sub>2</sub>) or volatile (acetone and methyl halide) thereby facilitating greatly product purification by either flash column chromatography or distillation. In addition, remarkably simple and mild reaction conditions (refluxing EtOAc during 30 minutes under normal atmosphere) and a low excess of the radical precursor reagent (2.0 equivalents) make this protocol particularly attractive for preparative synthetic applications. This initiation procedure has been demonstrated with a broad scope since it works efficiently to add a range of electrophilic radicals generated from iodides, bromides, selenides and xanthates over a range of unactivated terminal alkenes. A diverse set of radical trap substrates exemplifies a broad functional group tolerance. Finally, di-<i>tert</i>-butyl peroxyoxalate (DTBPO) is also demonstrated as alternative source of <i>tert-</i>butoxyl radicals to initiate these reactions under identical conditions which gives gaseous byproducts (CO<sub>2</sub>).

High-Performance Group Transfer Catalysis by Copper Complex with Redox-Active Ligand in an Entatic State

2019 ◽  
Author(s):  
Yufeng Ren ◽  
Jeremy Forte ◽  
Khaled Cheaib ◽  
Nicolas Vanthuyne ◽  
Louis Fensterbank ◽  
...  
Keyword(s):  
Copper Complex ◽  
High Performance ◽  
Group Transfer ◽  
Performance Group ◽  
Redox Active Ligand ◽  
Entatic State ◽  
Active Ligand ◽  
Redox Active

Feasibility of TEMPO-functionalized imidazolium, ammonium and pyridinium salts as redox-active carriers in ethaline deep eutectic solvent for energy storage

2020 ◽  
Vol 5 (6) ◽  
pp. 1147-1157
Author(s):  
Brian Chen ◽  
Sarah Mitchell ◽  
Nicholas Sinclair ◽  
Jesse Wainright ◽  
Emily Pentzer ◽  
...  
Keyword(s):  
Energy Storage ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Pyridinium Salts ◽  
Redox Active

Design and considerations for all organic, redox-active, deep eutectic solvents for energy storage.

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