Acid‐Functionalised Magnetic Ionic Liquid [AcMIm]FeCl 4 as Catalyst for Oxidative Hydroxylation of Arylboronic Acids and Regioselective Friedel–Crafts Acylation
2017; Wiley; Volume: 82; Issue: 8 Linguagem: Inglês
10.1002/cplu.201700221
ISSN2192-6506
AutoresArijit Saha, Soumen Payra, Dipa Dutta Pathak, Subhash Banerjee,
Tópico(s)Polyoxometalates: Synthesis and Applications
ResumoAbstract 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.
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