Phase-transfer catalyst
Spectrophotometric Determination of Colchicine by Phase Transfer Catalyst
... (Phase transfer catalyst). Phase transfer catalyst (PTC) was first introduced in the 1960s, as a tool to efficiently perform reactions between water soluble inorganic reagents ...
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Ultrasound assisted synthesis of N-aryl indole under multi-site phase-transfer catalyst: A kinetic study
... mass transfer is mainly due to the supporting mechanical effects ...multi-site phase-transfer catalyst (MPTC) combined with ultrasound shows the highest potential to increase the rate of the ...
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Benzylation of Imidazol Under a New Multi Site Phase Transfer Catalyst A Kinetic Study
... site phase transfer catalyst containing the maximum possible number of active ...site phase transfer catalyst (MPTC) by a only one step process using inexpensive starting ...
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Preparation and characterization of polyethylene glycol-bis(N-methylimidazolium) dihydroxide as a basic phase-transfer catalyst and its application in Knoevenagel condensation under aqueous media
... basic phase-transfer catalyst in Knoevenagel condensation reactions between aromatic aldehydes and active methylene compounds in water at room ...the catalyst gives the corresponding products ...
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A KINETIC STUDY ON THE FREE RADICAL POLYMERIZATION OF METHYL METHACRYLATEBY 1,1,4,4-TETRAMETHYL-1,4DIBENZYLETHYLENEDIAMMONIUM CHLORIDE (TMDBEDAC) AS DI-SITE PHASE TRANSFER CATALYST
... by phase transfer catalyst such as quaternary ammonium salts or macrocyclic ...In phase transfer catalysis monomer in the organic phase made to react with reagent in the aqueous ...
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Synthesis of a New NP Multi-Site Phase-Transfer Catalyst and Its Application to Dichlorocarbene Addition Reactions
... multi-site phase- transfer catalyst was obtained from the reaction of triphenylphosphine, 1,4-dibromobutane and ...multi-site phase-transfer catalyst the dichlorocarbene addition ...
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Free Radical Polymerization of Methyl Methacrylate under Multi-site Phase-transfer Catalyst - A Kinetic Study
... multi-site phase-transfer catalyst (MPTC) has been investigated in ethyl acetate / water two phase system at constant temperature 50 + 1°C under nitrogen ...aqueous phase, solvent ...
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Synthesis of Some Quinoline Intermediates Under Phase Transfer Catalyst
... The microwave synthesis of quinoline alkaloid 4-methoxyquinolin-2(1H)-one 3a and its analogues 3b-e was achieved in 8-11 minutes by methoxydechlorinated of 4-chloroquinolin-2(1H)- ones 2a-e using TBAB as phase ...
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The Dichlorocyclopropanation of Styrene and P-Chloromethyl Styrene Using Water Soluble Multi-Site Phase Transfer Catalyst A Kinetic Study
... multi-site phase transfer catalyst (MPTC), is demonstrated by studying hydroxide-ion initiated reaction like dichlorocarbene addition to ...multi-site phase transfer catalyst ...
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Polyethylene glycol-bis (N-methylimidazolium) dihydroxide as an efficient and recyclable basic phase-transfer catalyst for the synthesis of 4H-pyran derivatives in aqueous media
... basic phase-transfer catalyst in the synthesis of 2- amino-3-cyano-4H-pyrans via the one-pot three-component condensation reaction of aromatic aldehydes, malononitrile and 1,3-dicarbonyl compounds in ...
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Application of Magnetic Dicationic Ionic Liquid Phase Transfer Catalyst in Nuclophilic Substitution Reactions of Benzyl Halids in Water
... Magnetic dicationic ionic liquid (MDIL) was successfully prepared and evaluated as phase- transfer catalyst for nucleophilic substitution reactions. The reactions was occurred in water and furnished ...
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Propargylation of indole under a new dual-site phase-transfer catalyst: A kinetic study
... Quaternary ammonium salts are generally used as phase-transfer catalysts to promote reaction rate. In addition to DSPTC, six other single site quaternary ammonium salts, such as tetrabutylammonium bromide ...
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Synthesis of analogues of trifenagrel using phase transfer catalyst tetrabutyl ammonium hydrogen sulphate (TBAHS)
... benzil (840 mg, 4.0 mmol), 3-(2-dimethylaminoethoxy) benzaldehyde (840 mg, 4.0 mmol), ammoniumacetate (108 mg, 14.0 mmol), catalyst TBAHS (30 mol%) were taken and heated at 120° C with stirring for 6 h. After ...
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The Dichlorocyclopropanation of Norbornylene and 2-methyl Norbornylene using Multi-site Phase Transfer Catalyst - A Kinetic Study
... of catalyst upto ...with catalyst molecules and so further addition has only a minor effect on the observed ...the catalyst gave a straight line having a slope ...the catalyst was ...
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Phase transfer catalyzed polymerization of butylmethacrylate using peroxydiphosphate as an initiator – a kinetic study
... a phase transfer agent coupled with peroxo salts facilitate the formation of in situ phase transfer catalyst-PMS/ PDS complex intermediate and transfer from aqueous phase ...
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Enantion Selective Synthesis of Chairal Alfa Amino Acids by Phase Transfer Catalysts
... of phase transfer ...Organic phase & base in water Phase and a Phase transfer catalyst forming Mono anion at phase as a mono alkylation Glycine product ...
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Electrochemical control of organic reactions involving phase transfer
... the phase of the other reactant, the phase transfer catalyst must enable suitable reaction conditions for the transferred ...to transfer the anion, the reactivity o f the anion is ...
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Synthesis of Diallyl Thioether under the Influence of Ultrasound Assisted Multi-Site Phase-Transfer Catalysis Condition – A Kinetic Study.
... liquid-liquid phase-transfer catalysts (LLPTC) bi-phase ...in phase-transfer catalyst (PTC) reactions rate enhancements are in phase-transfer due to mechanical ...
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A Highly Diastereoselective and Enantioselective Phase-Transfer Catalyzed Epoxidation of β-Trifluoromethyl-β,β-disubstituted Enones with H2O2
... universal phase-transfer catalyst is available for highly enantioselective epoxidation of all classes of different enone ...practical phase-transfer catalysis systems for asymmetric ...
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Kinetics of free radical polymerization of methylacrylate initiated by potassium peroxydisulfate and cetylpyridinium chloride system
... of phase transfer catalyst (PTC) assisted polymerization of Methyl acrylate (MA) initiated cetylpyridinium chloride (CPC) system was investigated in atmosphere and unstirred ...
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