Phase-Transfer Catalysis, Mechanism and Syntheses
نویسندگان
چکیده
منابع مشابه
Interfacial Mechanism and Kinetics of Phase-Transfer Catalysis
As the chemical reactants reside in immiscible phases, phase transfer (PT) catalysts have the ability to carry one of the reactants as a highly active species for penetrating the interface, into the other phase where the reaction takes place, and to give a high conversion and selectivity for the desired product under mild reaction conditions. This type of reaction was termed ‘‘phase-transfer ca...
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Ultrasound assisted phase-transfer catalyzed preparation of ethyl 2-(4-nitrophenoxy)acetate from the corresponding p-nitrophenol and ethyl 2-bromoacetate using the mild solid base, anhydrous potassium carbonate, under very mild conditions is reported. The solid-liquid reactions were performed in a batch reactor equipped with reflux condenser, and ultrasonic irradiations were introduced using an...
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In this paper, we report the reaction of isoamyl alcohol and 1-chloro-4-nitrobenzene was carried out in a batch reactor under aqueous-organic biphasic conditions using the techniques like phase transfer catalysis and ultrasound irradiation. Tetrabutylammonium bromide (TBAB) was employed as the phase transfer catalyst. The reaction is greatly enhanced by adding a small quantity of phase-transfer...
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Phosphoryl-transfer reactions are central to biology. These reactions also have some of the slowest nonenzymatic rates and thus require enormous rate accelerations from biological catalysts. Despite the central importance of phosphoryl transfer and the fascinating catalytic challenges it presents, substantial confusion persists about the properties of these reactions. This confusion exists desp...
متن کاملphase transfer catalysis ( PTC ) : past , present and future
The advantages of PTC for industrial processes are discussed and recent progress in catalysts, methodology and applications is critically reviewed. Various trends and new applications of commercial interest are emphasized.
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ژورنال
عنوان ژورنال: Synthesis
سال: 1998
ISSN: 0039-7881,1437-210X
DOI: 10.1055/s-1998-5919