A remarkably rapid regioselective synthesis of β-enaminones using silica chloride in a heterogeneous as well as an ionic liquid in a homogeneous medium at room temperature

Silica chloride as a heterogeneous catalyst has been used for the regioselective synthesis of β-amino-α,β unsaturated esters and ketones. Similar regioselective synthesis was also performed using an ionic liquid 1- n-butyl imidazolium tetrafluoroborate [Hbim]BF 4 as a recyclable homogeneous medium a...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 2006-02, Vol.245 (1), p.37-46
Main Authors: Gholap, Atul R., Chakor, Narayan S., Daniel, Thomas, Lahoti, Rajgopal J., Srinivasan, Kumar V.
Format: Article
Language:English
Subjects:
1,3-Diketones
Amines
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Ionic liquid
Silica chloride
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
β-Enaminones
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Summary:Silica chloride as a heterogeneous catalyst has been used for the regioselective synthesis of β-amino-α,β unsaturated esters and ketones. Similar regioselective synthesis was also performed using an ionic liquid 1- n-butyl imidazolium tetrafluoroborate [Hbim]BF 4 as a recyclable homogeneous medium as well as a promoter without the need for any added catalyst. Both the methods were found to be remarkably rapid and afforded the β-enaminones in excellent isolated yields.
ISSN:1381-1169
1873-314X
DOI:10.1016/j.molcata.2005.09.021