Journal of Molecular Catalysis A-Chemical, Vol.245, No.1-2, 37-46, 2006
A remarkably rapid regioselective synthesis of beta-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 P-amino-a,P unsaturated esters and ketones. Similar regioselective synthesis was also performed using an ionic liquid 1-n-butyl imidazolium tetrafluoroborate [Hbim]BF4 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 beta-enaminones in excellent isolated yields. (c) 2005 Elsevier B.V. All rights reserved.