Knoevenagel Reaction of Diethylphosphonoacetic Acid: A Facile Route to Diethyl (<i>E</i>)-2-Arylvinylphosphonates
作者:Henryk Krawczyk、Łukasz Albrecht
DOI:10.1055/s-2005-918406
日期:——
Knoevenagel reaction of aromatic aldehydes or a-substituted aliphatic aldehydes with diethylphosphonoacetic acid leads to the formation of 3-substituted-2-(diethoxyphosphoryl)acrylic acids. Decarboxylation of the resulting (E)-3-aryl-2-(diethoxyphosphoryllacrylic acids afforded diethyl (E)-2-arylvinylphosphonates. Direct synthesis of diethyl vinylphosphonates from some aromatic aldehydes and formaldehyde
The one-pot transesterification of diethylarylvinylphosphonates with N-acetylcysteamine has been achieved using phosphonochloridates as intermediates. Reaction of phosphonodiesters with (COCl)(2) gave the corresponding chlorinated compounds, which were coupled with N-acetylcysteamine in presence of Et3N. (C) 2003 Published by Elsevier Science Ltd.
Design, Synthesis, and Evaluation of Pharmacological Properties of Cinnamic Derivatives as Antiatherogenic Agents
A series of cinnamic and phosphonocinnamic derivatives have been synthesized and their ability to inhibit cell-mediated LDL oxidation and oxidized LDL-induced cytotoxicity was investigated. Electron-donating substituents surrounding the necessary 4-OH group of the aromatic ring showed the best results. Among the different series tested, amide 1, thioester 5c, phosphonoester 7c, and the fluorophosphonocinnamic