Green Application of Phase-Transfer Catalysis in Oxidation: A Comprehensive Review

2020 ◽  
Vol 17 (4) ◽  
pp. 405-411
Author(s):  
Chuan-Hui Wang ◽  
Chen-Fu Liu ◽  
Guo-Wu Rao
Keyword(s):  
Organic Chemistry ◽  
Green Chemistry ◽  
Oxidation Reaction ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Important Application ◽  
Oxidation Reactions ◽  
Comprehensive Review ◽  
Phase Transfer Catalysts ◽  
Onium Salts

Oxidation reactions have emerged as one of the most versatile tools in organic chemistry. Various onium salts such as ammonium, phosphonium, arsonium, bismuthonium, tellurium have been used as phase transfer catalysts in many oxidation reactions. Certainly, considerable catalysts have been widely used in Phase-Transfer Catalysis (PTC). This review focuses on the application of PTC in various oxidation reaction. Furthermore, PTC also conforms to the concept of “Green Chemistry”. <p></p> • Oxidation has become one of the most widely used tools in organic chemistry and phase transfer catalysts has been widely used in oxidation. <p></p> • The application of phase transfer catalysts in oxidation reaction will be summarized. <p></p> • Phase transfer catalysts have important application in various oxidation reaction.

scholarly journals Efficiency of selected phase transfer catalysts for the synthesis of 1,2-epoxy-5,9-cyclododecadiene in the presence of H2O2/H3PW12O40 as catalytic system

2013 ◽  
Vol 15 (3) ◽  
pp. 96-99 ◽  
Author(s):  
Grzegorz Lewandowski
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Pyridinium Chloride ◽  
Pyridinium Bromide ◽  
Cetyl Pyridinium Chloride ◽  
Phase Transfer Catalysts ◽  
Onium Salts ◽  
Didodecyldimethylammonium Bromide ◽  
Cetyl Pyridinium

Abstract The results of the studies on the influence of the phase transfer catalyst on the epoxidation of (Z,E,E)-1,5,9-cyclododecatriene (CDT) to 1,2-epoxy-5,9-cyclododecadiene (ECDD) in the H2O2/H3PW12O40 system by a method of phase transfer catalysis (PTC) were presented. The following quaternary ammonium salts were used as phase transfer catalysts: methyltributylammonium chloride, (cetyl)pyridinium bromide, methyltrioctylammonium chloride, (cetyl)pyridinium chloride, dimethyl[dioctadecyl(76%)+dihexadecyl(24%)] ammonium chloride, tetrabutylammonium hydrogensulfate, didodecyldimethylammonium bromide and methyltrioctylammonium bromide. Their catalytic activity was evaluated on the basis of the degree of CDT and hydrogen peroxide conversion and the selectivities of transformation to ECDD in relation to consumed CDT and hydrogen peroxide. The most effective PT catalysts were selected based on the obtained results. Among the onium salts under study, the epoxidation of CDT with hydrogen peroxide proceeds the most effectively in the presence of methyltrioctylammonium chloride (Aliquat® 336) and (cetyl)pyridinium chloride (CPC). The relatively good results of CDT epoxidation were also achieved in the presence of Arquad® 2HT and (cetyl)pyridinium bromide

Polystyrene-Supported Onium Salts as Phase-Transfer Catalysts

1997 ◽  
pp. 248-260 ◽  
Author(s):  
Noritaka Ohtani ◽  
Yukihiko Inoue ◽  
Jun Mukudai ◽  
Tsuyoshi Yamashita
Keyword(s):  
Phase Transfer ◽  
Phase Transfer Catalysts ◽  
Onium Salts

Tribocatalytic Enhancement of Methane Oxidation

2005 ◽  
Author(s):  
Tomotaka Abe ◽  
Ken’ichi Hiratsuka ◽  
Czesław Kajdas
Keyword(s):  
Organic Chemistry ◽  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Aluminum Oxide ◽  
Electron Emission ◽  
Oxidation Reaction ◽  
Negative Ion ◽  
Silver Catalyst ◽  
Oxidation Reactions ◽  
Action Mechanism

Oxidation reaction of methane is one of the most fundamental reactions in organic chemistry. This reaction is enhanced by silver catalyst [1]. In this study, we confirmed that the catalytic activity of silver is enhanced more by the friction. This effect is called tribocatalysis. In previous studies about tribocatalysis, we have shown that the oxidation reactions of hydrogen [2], carbon monoxide [3] and ethylene were promoted by the friction. According to NIRAM (negative-ion-radical action mechanism) approach, exo-electron emission triggers the promotion of chemical reactions [4]. Insulator such as aluminum oxide, when it is worn, emits larger number of negative particles including electrons compared with metals [5]. Therefore we expected that the friction of aluminum oxide promotes tribochemical reactions more than metals.

scholarly journals Chiral Phase-Transfer Catalysts with Hydrogen Bond: A Powerful Tool in the Asymmetric Synthesis

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 244 ◽  
Author(s):  
Hongyu Wang
Keyword(s):  
Organic Synthesis ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Chiral Phase ◽  
Design Synthesis ◽  
Phase Transfer Catalysts ◽  
The Past ◽  
Hydrogen Bonding Interactions ◽  
Chiral Phase Transfer Catalysts ◽  
Made In

Asymmetric phase-transfer catalysis has been widely applied into organic synthesis for efficiently creating chiral functional molecules. In the past decades, chiral phase-transfer catalysts with proton donating groups are emerging as an extremely significant strategy in the design of novel catalysts, and a large number of enantioselective reactions have been developed. In particular, the proton donating groups including phenol, amide, and (thio)-urea exhibited unique properties for cooperating with the phase-transfer catalysts, and great advances on this field have been made in the past few years. This review summarizes the seminal works on the design, synthesis, and applications of chiral phase-transfer catalysts with strong hydrogen bonding interactions.

scholarly journals Synthesis and Reactions of Five-Membered Heterocycles Using Phase Transfer Catalyst (PTC) Techniques

2014 ◽  
Vol 2014 ◽  
pp. 1-47 ◽  
Author(s):  
Ahmed M. El-Sayed ◽  
Omyma A. Abd Allah ◽  
Ahmed M. M. El-Saghier ◽  
Shaaban K. Mohamed
Keyword(s):  
Organic Synthesis ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Heterogeneous Reaction ◽  
Reaction Rates ◽  
Industrial Processes ◽  
Phase Transfer Catalysts ◽  
Traditional Technologies ◽  
Solid Liquid ◽  
Active Intermediates

Phase transfer catalysts (PTCs) have been widely used for the synthesis of organic compounds particularly in both liquid-liquid and solid-liquid heterogeneous reaction mixtures. They are known to accelerate reaction rates by facilitating formation of interphase transfer of species and making reactions between reagents in two immiscible phases possible. Application of PTC instead of traditional technologies for industrial processes of organic synthesis provides substantial benefits for the environment. On the basis of numerous reports it is evident that phase-transfer catalysis is the most efficient way for generation and reactions of many active intermediates. In this review we report various uses of PTC in syntheses and reactions of five-membered heterocycles compounds and their multifused rings.

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