Cationic quaternary ammonium salt-catalyzed LED-induced living radical polymerization with in situ halogen exchange

2020 ◽  
Vol 11 (23) ◽  
pp. 3876-3883
Author(s):  
Feifei Li ◽  
Wanting Yang ◽  
Mengmeng Li ◽  
Lin Zhou ◽  
Lin Lei
Keyword(s):  
Radical Polymerization ◽  
Quaternary Ammonium ◽  
Light Emitting Diode ◽  
Quaternary Ammonium Salts ◽  
Living Radical Polymerization ◽  
Ammonium Salts ◽  
Light Emitting ◽  
Halogen Exchange ◽  
Methacrylate Monomers

Cationic quaternary ammonium salts were employed as organocatalysts for light-emitting diode (LED)-induced living radical polymerization (LRP) with the in situ halogen exchange of methacrylate monomers.

Highly ordered AIEgen directed silica hybrid mesostructures and their light-emitting behaviours

2019 ◽  
Vol 7 (2) ◽  
pp. 346-353 ◽  
Author(s):  
Hui Chang ◽  
Wenting Mao ◽  
Yingying Duan ◽  
Wanning Zhang ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Light Emitting ◽  
Aggregation Induced Emission ◽  
Silica Hybrids ◽  
Silica Hybrid

Mesostructured fluorescent silica hybrids (MFSHs) were synthesized by using tetraphenylethylene (TPE)-based quaternary ammonium salts as surfactants with typical aggregation-induced emission (AIE) behaviours.

scholarly journals Highly recyclable polymer supported ionic liquids as efficient heterogeneous catalysts for batch and flow conversion of CO2 to cyclic carbonates

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2836-2841 ◽  
Author(s):  
Tao Wang ◽  
Wenlong Wang ◽  
Yuan Lyu ◽  
Xingkun Chen ◽  
Cunyao Li ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Radical Polymerization ◽  
Quaternary Ammonium ◽  
Heterogeneous Catalysts ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Cyclic Carbonates ◽  
Polymer Supported ◽  
Supported Ionic Liquids

A series of cross-linked polymer supported ionic liquids based on quaternary ammonium salts have been prepared using a facile method of radical polymerization.

scholarly journals Exploring the Scope of Tandem Palladium and Isothiourea Relay Catalysis for the Synthesis of α-Amino Acid Derivatives

Molecules ◽  
2020 ◽  
Vol 25 (10) ◽  
pp. 2463
Author(s):  
Jacqueline Bitai ◽  
Alexandra M. Z. Slawin ◽  
David B. Cordes ◽  
Andrew D. Smith
Keyword(s):  
Amino Acid ◽  
Transition State ◽  
Quaternary Ammonium ◽  
Palladium Catalyst ◽  
Quaternary Ammonium Salts ◽  
Sigmatropic Rearrangement ◽  
Ammonium Salts ◽  
Amino Acid Derivatives ◽  
Substitution Pattern

The scope and limitations of a tandem N-allylation/[2,3]-rearrangement protocol are investigated through the incorporation of a variety of functional groups within an allylic phosphate precursor. This method uses readily accessible N,N-dimethylglycine aryl esters and functionalized allylic phosphates, forming quaternary ammonium salts in situ in the presence of a palladium catalyst. Subsequent enantioselective [2,3]-sigmatropic rearrangement, promoted by the chiral isothiourea tetramisole, generates α-amino acid derivatives with two contiguous stereocenters. The incorporation of electron-withdrawing ester and amide groups gave the best results, furnishing the desired products in moderate to good yields (29–70%), with low diastereocontrol (typically 60:40 dr) but high enantioselectivity (up to 90:10 er). These results indicate that substrate–catalyst interactions in the proposed transition state are sensitive to the substitution pattern of the substrates.

scholarly journals Organocatalyzed Living Radical Polymerization via in Situ Halogen Exchange of Alkyl Bromides to Alkyl Iodides

2017 ◽  
Vol 50 (5) ◽  
pp. 1882-1891 ◽  
Author(s):  
Longqiang Xiao ◽  
Keita Sakakibara ◽  
Yoshinobu Tsujii ◽  
Atsushi Goto
Keyword(s):  
Radical Polymerization ◽  
Living Radical Polymerization ◽  
Alkyl Bromides ◽  
Halogen Exchange ◽  
Alkyl Iodides

Synthesis of Amidation Agents and their Reactivity in Condensation Reactions

Synthesis ◽  
2020 ◽  
Author(s):  
Roberto Sole ◽  
Vanessa Gatto ◽  
Silvia Conca ◽  
Lodovico Agostinis ◽  
Noemi Bardella ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
The Novel ◽  
Reaction Conditions ◽  
1H And 13C Nmr ◽  
Full Characterization ◽  
Ft Ir

Nowadays, the development of new approaches which smartly bypass the use of harsh reaction conditions and hazardous chemicals covers a pivotal role. In this research paper the synthesis, characterization and application of novel libraries of triazine bis-quaternary ammonium salts, employed as coupling agents to produce amides, is reported. Full characterization of the novel compounds by 1H and 13C NMR, FT-IR spectroscopy, ESI-HRMS and elemental analysis (EA) is provided. Furthermore, a comparison in terms of activity of the preformed triazine compounds versus in situ formulations has been evaluated for the formation of amides in the presence of phenylethylamine and different aliphatic or aromatic acids. A possible correlation between the chemical structure of the triazine and their reactivity for the formation of the triazine bis-quaternary ammonium salts is also reported. Moreover, best performing condensation agents have been further tested for the cross-linking of collagen powder as possible wet white tanning systems, for sustainable and environmentally friendly leather tanning.

Synthesis, characterization and antimicrobial activities of water-soluble amphiphilic copolymers containing ciprofloxacin and quaternary ammonium salts

2015 ◽  
Vol 3 (18) ◽  
pp. 3704-3713 ◽  
Author(s):  
Man He ◽  
Huining Xiao ◽  
Yuming Zhou ◽  
Peng Lu
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Antimicrobial Activities ◽  
Quaternary Ammonium Salts ◽  
Water Soluble ◽  
Ammonium Salts ◽  
Amphiphilic Copolymers ◽  
Methacrylate Monomers

Novel water-soluble amphiphilic copolymers with ciprofloxacin are prepared by copolymerization of methacrylate monomers containing ciprofloxacin and quaternary ammonium salt monomers.

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