Résumé Organocatalyst trityl chloride (Ph3CCl), by in situ formation of trityl carbocation with inherent instability, efficiently promotes the cross-aldol condensation reaction between cycloalkanones and arylaldehydes in solvent-free and homogeneous media to afford α,α′-bis(arylidene)cycloalkanones in high yields. Moreover, an attractive and plausible mechanism based on observations and the literature is proposed for the reaction.
Solvent-free catalytic preparation of 2,6-dibenzylidenecycloalkanones using 2-hydroxyethylammonium acetate ionic liquid as catalyst
作者:Li Q. Kang、Yue Q. Cai、Hao Wang、Li H. Li
DOI:10.1007/s00706-013-1082-8
日期:2014.2
AbstractVarious 2,6-dibenzylidenecycloalkanones were readily prepared in a condensation reaction catalyzed by 2-hydroxyethylammoniumacetate ionic liquid under solvent-free conditions in excellent yields. The major advantages of the present method are high yields, short reaction times, lack of solvent, simplicity of performance, and low cost. Graphical abstract
Sulfuric Acid-modified PEG-6000 (PEG-SO<sub>3</sub>H): An Efficient, Bio-degradable and Reusable Catalyst for Synthesis of &alpha;, &alpha;' bis(arylidene) Cycloalkanones Under Solvent-free Conditions
作者:Mohammad A. Nasseri、Mehri Salimi
DOI:10.2174/1570178611310030004
日期:2013.4.1
A green and efficient method for synthesis of α,α' -bis (arylidene) cycloalkanones, starting from aromatic aldehydes in reaction with ketones using sulfonated polyethylene glycol 6000 (PEG-SO3H) as a stable, reusable and biodegradable catalyst under solvent-free conditions at 80 °C is described. The use of a nontoxic, inexpensive, easily available and recyclable catalyst makes this protocol practical
An efficient green approach to aldol and cross-aldol condensations of ketones with aromatic aldehydes catalyzed by nanometasilica disulfuric acid in water
作者:A. Nakhaei、A. Morsali、A. Davoodnia
DOI:10.1134/s1070363217050292
日期:2017.5
Aldol and cross-aldol condensations of aromaticaldehydes with various ketones in the presence of nanometasilica disulfuric acid (NMSDSA) as heterogeneous catalyst are presented. The catalyst was prepared according to the developed earlier method using inexpensive and readily available starting materials. The highly active catalyst gave excellent yields of the desired aldol products without self-condensation
Synthesis, docking, and in vitro studies of some substituted bischalcones on acid and alkaline phosphatases
作者:Mamta Singh、Neera Raghav
DOI:10.1007/s00044-013-0780-4
日期:2014.4
decrease in total energy (ranging from −75.50 to −100.84) for all the synthesized compounds which were less than levamisole (−50.69) revealing higher binding with the enzyme. The compounds were synthesized by Clasien–Schimdt condensation and their effect was observed on the activity of acid and alkaline phosphatases. The results showed that synthesized bischalcones were inhibitory to alkaline phosphatases