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Magnetic‐Nanoparticle‐Supported 2,2′‐Bis[3‐(triethoxysilyl)propyl]imidazolium‐Substituted Diethyl Ether Bis(tribromide): A Convenient Recyclable Reagent for Bromination
Author(s) -
Wu Liqiang,
Yin Zhikui
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300755
Subject(s) - halogenation , chemistry , reagent , tribromide , nanoparticle , ionic liquid , diethyl ether , bromine , magnetic nanoparticles , ether , organic chemistry , catalysis , nanotechnology , materials science
A new magnetic‐nanoparticle‐supported bromination reagent was synthesized by anchoring a 2,2′‐bis[3‐(triethoxysilyl)propyl]imidazolium‐substituted diethyl ether bis(tribromide) onto the surface of γ‐Fe 2 O 3 nanoparticles and subsequently treating this new ionic liquid with bromine. The nanoparticle reagent was obtained with good loading levels and has been successfully used for the efficient bromination of a wide range of alkenes, alkynes, ketones, and aromatic substrates. More importantly, the reagent could be easily recovered by an external magnet and reused six times without significant loss of activity.