Zr(HSO<sub>4</sub>)<sub>4</sub>/SiO<sub>2</sub> as an Efficient Alternative Catalyst for the Claisen-Schmidt Condensation
作者:Bi Bi Fatemeh Mirjalilia、Abddhamid Bamoniri、Masoumeh Alipour、Mohammad Ali Karimi Zarchia
DOI:10.1515/znb-2008-1213
日期:2008.12.1
Zr(HSO4)4/SiO2 promotes the regio-, stereo- and chemoselectiveClaisen-Schmidtcondensation of aromatic aldehydes with ketones under solvent-free conditions with improved yields. The work-up of the reaction mixture is simple, and the catalyst is easily removed from the products by simple filtration.
Bovine serum albumin-catalysed cross aldol condensation: Influence of ketone structure
作者:Sebastián M. Ardanaz、Estefanía L. Borucki、Ana J. Velez Rueda、Gustavo Parisi、Adolfo M. Iribarren、Luis E. Iglesias
DOI:10.1016/j.procbio.2019.08.003
日期:2019.11
Abstract Bovine serum albumin (BSA) catalyses the cross aldol condensation and proved to be catalytically active at mild temperature and in ethanol, a cheap and green solvent, contrasting with the strong or expensive reaction media usually employed for this reaction. We herein report the reaction of a set of ketones (butanone, 3-pentanone, cyclopentanone and cyclohexanone) with benzaldehyde and p-nitrobenzaldehyde
Aldol condensations of aldehydes and ketones catalyzed by rare earth(III) perfluorooctane sulfonates in fluorous solvents
作者:Wen-Bin Yi、Chun Cai
DOI:10.1016/j.jfluchem.2005.09.004
日期:2005.12
Rare earth(III) perfluorooctane sulfonates (RE(OPf)3) catalyze the efficient aldol condensation of different ketones with various aromatic aldehydes in fluorous solvents without the occurrence of any self-condensations. By simple separation of the fluorous phase containing only catalyst, reaction can be repeated several times.
aromatic aldehydes undergoes crossed aldol condensation with ketones in the presence of a catalytic amount of Yb(OTf) 3 under solvent-free conditions to afford the corresponding α,α'-bis(substitutedbenzylidene)cycloalkanones in excellent yields without occurrence of any side reactions. This method is very general, simple and environmental friendly in contrast with the existing methods, which use many
Solvent-Free Crossed Aldol Condensation of Cyclic Ketones with Aromatic Aldehydes Assisted by Microwave Irradiation
作者:Abbas A. Esmaeili、Mehri Salimi Tabas、Mohammad A. Nasseri、Foad Kazemi
DOI:10.1007/s00706-004-0256-9
日期:2005.4
A fast alumina-promoted crossed aldol-condensation reaction of aldehydes and cyclic ketones under microwave irradiation is described. This process is simple, efficient, and environmentally benign and proceeds in fairly high yield without any self-condensation.