Iron catalyzed Michael addition: Chloroferrate ionic liquids as efficient catalysts under microwave conditions
作者:Maria Vasiloiu、Peter Gaertner、Katharina Bica
DOI:10.1007/s11426-012-4657-z
日期:2012.8
containing ionicliquid 1-butyl-3-methylimidazolium tetrachloroferrate ([C4mim]Cl/FeCl3; χ = 0.5) proved to be an efficient catalyst for the solvent-free metal catalyzed Michaeladdition of β-keto esters and enones. Due to the ionic structure of the catalyst, a significant acceleration of the reaction rate was observed under microwave conditions. Furthermore, recycling of the ionicliquid catalyst could
An Efficient Organocatalytic Method for Highly Enantioselective Michael Addition of Malonates to Enones Catalyzed by Readily Accessible Primary Amine-Thiourea
作者:Krzysztof Dudziński、Anna M. Pakulska、Piotr Kwiatkowski
DOI:10.1021/ol3019055
日期:2012.8.17
A practical and highlyenantioselectiveMichaeladdition of malonates to enones catalyzed by simple and readily available bifunctional primary amine-thiourea derived from 1,2-diaminocyclohexane is reported. The addition of weak acids and elevated temperature (ca. 50 °C) improved the efficiency of the Michael reaction. This approach enables the efficient synthesis of 1,5-ketoesters with good yields
ZrCl<sub>4</sub>-Catalyzed Michael Reaction of 1,3-Dicarbonyls and Enones under Solvent-Free Conditions
作者:Ch. Reddy、G. Smitha、Sujatha Patnaik
DOI:10.1055/s-2005-861837
日期:——
ZrCl4 has been found to catalyze the conjugate addition of 1,3-dicarbonyl compounds with enones. The reaction does not require any solvent and proceeds smoothly at room temperature leading to the corresponding adduct in good yields.
Solvent free reaction under microwave irradiation: A new procedure for Eu+3 — Catalyzed Michael addition of 1,3-dicarbonyl compounds
作者:Annunziata Soriente、Aldo Spinella、Margherita De Rosa、Manuela Giordano、Arrigo Scettri
DOI:10.1016/s0040-4039(96)02294-0
日期:1997.1
CC bond formation via Michael addition is achieved in high yields and short times by employing catalytic amounts of EuCl3 in dry media undermicrowaveirradiation.