Journal
TETRAHEDRON
Volume 64, Issue 49, Pages 11209-11217Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.09.055
Keywords
Ionic liquids; Mechanism reaction; MRH reaction
Categories
Funding
- MIUR [PRIN 20066034372]
- Universities of Palermo and Bologna
Ask authors/readers for more resources
The reactivity of E- and Z-phenylhydrazones of 3-benzoyl-5-phenyl-1,2,4-oxadiazole in the presence of CuCl2 and Cu(ClO4)(2)center dot 6H(2)O has been Studied in four imidazolium ionic liquids [bmim][X] (X = BF4-, PF6-, SbF6- and CF3SO3-), and CF3SO3-). The reaction may follow different mechanistic patterns, depending on the nature of the ionic liquid anion, accounting for both qualitative and kinetic data. In the presence of CuCl2, two processes take place at the same time, i.e., the Et reversible arrow Z isomerization and the rearrangement of Z-isomer into the relevant 4-benzoylamino-2,5-diphenyl-1,2,3-triazole. In contrast. in the presence of Cu(ClO4)(2)center dot 6H(2)O, the rearrangement Occurs only in solution of [bmim][BF4] and [bmim][CF3SO3]. Collected data show that the effect of the ionic liquid on the isomerization and the rearrangement is different. in particular, a higher cross-linking degree seems to favour the triazole, but disfavour the E reversible arrow Z isomerization. (C) 2008 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available