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Acid‐Functionalised Magnetic Ionic Liquid [AcMIm]FeCl 4 as Catalyst for Oxidative Hydroxylation of Arylboronic Acids and Regioselective Friedel–Crafts Acylation
Author(s) -
Saha Arijit,
Payra Soumen,
Dutta Dipa,
Banerjee Subhash
Publication year - 2017
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201700221
Subject(s) - ionic liquid , chemistry , regioselectivity , thermogravimetric analysis , hydroxylation , acylation , thermal stability , catalysis , friedel–crafts reaction , thermal decomposition , solvent , organic chemistry , polymer chemistry , inorganic chemistry , enzyme
An acid‐functionalised, magnetic, room‐temperature ionic liquid, 1‐acyl‐3‐methylimidazolium tetrachloroferrate ([AcMIm]FeCl 4 ), was synthesised and its optical, magnetic, and thermal properties were investigated. The magnetic moment (0.05402 emu in 2 T magnetic fields) showed strong paramagnetic behaviour, and thermogravimetric analysis indicated very good thermal stability with a decomposition temperature higher than 230 °C. Additionally, [AcMIm]FeCl 4 efficiently catalysed the oxidative ipso ‐hydroxylation of arylboronic acids and regioselective Friedel–Crafts acylation without external organic solvent or additives, such as acids, base, and ligands. This functionalised ionic liquid, [AcMIm]FeCl 4 , was recycled and reused at least six times without significant loss of its catalytic properties and stability.