A phenylalanine-urea compound-catalyzed Knoevenagel condensation in water is reported. Various aldehydes and active methylene compounds undergo condensation at room temperature to give the desired products in high yields. The mechanism of the condensation of aldehydes with Meldrum's acid catalyzed by the novel urea derivative is also disclosed. (C) 2013 Elsevier Ltd. All rights reserved.
Innovative Bio-Based Organic UV-A and Blue Light Filters from Meldrum’s Acid
作者:Cédric Peyrot、Matthieu M. Mention、Fanny Brunissen、Patrick Balaguer、Florent Allais
DOI:10.3390/molecules25092178
日期:——
been developed fromMeldrum’s acid and bio-based and synthetic p-hydroxycinnamic acids, furans and pyrroles. Moreover, p-hydroxycinnamic acid-based Meldrum’s derivatives possess valuable secondary activities sought by the cosmetic industry such as antioxidant and anti-tyrosinase properties. The evaluation of the properties of mixture of judiciously chosen Meldrum’s acidderivatives highlighted the