5 Phase-transfer catalysis and the ion pair concept

2021 ◽  
pp. 197-228
Author(s):  
Florenci V. González Adelantado
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Ion Pair

Anwendungen der Phasentransfer-Katalyse, 33 [1] Zur Extraktion von Peroxosulfaten in organische Medien und zur oxidativen Phenolkopplung durch Peroxodisulfat / Applications of Phase Transfer Catalysis, 33 [1 ] On the Extraction of Peroxosulfates into Organic Media and on the Oxidative Phenol Coupling by Peroxodisulfate

1985 ◽  
Vol 40 (11) ◽  
pp. 1583-1585 ◽  
Author(s):  
Eckehard V. Dehmlow ◽  
Burkhard Vehre ◽  
Jagdish K. Makrandi
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Ion Pair ◽  
Organic Media

Salts of the types (NR4)2S2O8 and NR4HSO5 can be prepared easily by ion pair extraction. The lipophilicity of persulfate anions is classified. Phase transfer catalyzed peroxodisulfate oxidation of 2,6- disubstituted phenols yields diphenoquinones.

Phase-transfer catalysis and the ion pair concept

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Florenci V. González Adelantado
Keyword(s):  
Amino Acids ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Conjugate Addition ◽  
Ion Pair ◽  
Asymmetric Reactions ◽  
Conjugate Additions ◽  
Mannich Reactions ◽  
Recent Advances

AbstractThis review outlines the recent advances in the field of asymmetric phase-transfer catalysis and the ion-pair concept including alkylation of amino acids and peptides, oxyindoles and other substrates, conjugate additions, fluorinations, photo-induced phase-transfer catalysis, Nitro-Mannich reactions, heterocyclizations and cycloadditions for the preparation of heterocycles, derivatization of isoxazoles, umpolung conjugate addition of imines and other three asymmetric reactions.

The regioselective α-alkylation of the benzophenone imine of glycinamide, alaninamide, and related derivatives

2006 ◽  
Vol 84 (10) ◽  
pp. 1301-1312 ◽  
Author(s):  
Martin J O'Donnell ◽  
Jeremy D Keeton ◽  
Vien Van Khau ◽  
John C Bollinger
Keyword(s):  
Crystal Structures ◽  
Schiff Bases ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Ion Pair ◽  
X Ray ◽  
Disubstituted Product

The benzophenone imine of glycinamide was alkylated using ion pair extraction (RX, 10% aq. NaOH, Bu4NHSO4 (1 equiv.), CH2Cl2, rt) to give the α-monosubstituted products, which were then alkylated a second time using stronger basic conditions (KO-t-Bu, THF, 0 °C, RX). Crystal structures of the Schiff bases of glycinamide, an α-monosubstituted and an α,α-disubstituted product were reported.Key words: benzophenone imines, Schiff bases, alkylation, ion pair extraction (IPE), phase-transfer catalysis (PTC), anhydrous base, X-ray crystal structures.

Pseudoenzymatic catalyst–substrate interactions in ion-pair mediated chiral phase transfer catalysis

2006 ◽  
Vol 47 (31) ◽  
pp. 5581-5583 ◽  
Author(s):  
Apurba Bhattacharya ◽  
Tomas Vasques ◽  
Thomas Ramirez ◽  
Robert Erik Plata ◽  
Jiejun Wu
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Ion Pair ◽  
Chiral Phase ◽  
Substrate Interactions
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