Premium
Efficient Aerobic Oxidative Synthesis of Benzimidazoles with Fe(III) based PEG 1000 Dicationic Imidazolium Ionic Liquid/toluene Temperature‐dependent Biphasic System
Author(s) -
Wang Zhaogang,
Xia Yonggen,
Jin Yong,
Lu Ming
Publication year - 2015
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201400298
Subject(s) - chemistry , ionic liquid , toluene , catalysis , peg ratio , ion , nuclear chemistry , medicinal chemistry , organic chemistry , finance , economics
A green protocol for the synthesis of benzimidazoles with Fe(III) based PEG1000 dicationic imidazolium ionic liquid ([PEG 1000 mim 2 ][FeCl 4 ] 2 )/toluene temperature‐dependent biphasic system was described. Conformed by IR analysis, FeCl 4 − is the dominating anion species. It could be seen that aldehydes aryla mines and aromatic aldehydes bearing electron‐deficient group (Cl, Br, NO 2 ) and electron‐rich groups (OH, N(CH 3 ) 2 ) on the aromatic rings gave good yields (78–96 %). Moreover, the Fe(III) based PEG1000 dicationic imidazolium ionic liquid could be recycled and reused without significant loss of catalytic activity after seven runs.