http://http://dspace.unitus.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Sat, 18 May 2013 23:14:44 GMT 2013-05-18T23:14:44Z http://hdl.handle.net/2067/1881 Title: Chemoselective and efficient carboxymethylation of the alcoholic chain of phenols by dimethyl carbonate (DMC). Authors: Bernini, Roberta; Mincione, Enrico; Crisante, Fernanda; Barontini, Maurizio; Fabrizi, Giancarlo; Gentili, Patrizia Abstract: The efficiency of dimethyl carbonate (DMC) as chemoselective carbomethoxylating agent of the alcoholic chain of phenols has been investigated. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or sulfuric acid as catalysts. New carbomethoxylated phenolic compounds were obtained in quantitative yields. A new efficient derivatization of the aliphatic alcoholic chain of the precious natural hydroxytyrosol is described, which increases the lipophilicity of the hydroxytyrosol. The antioxidant activity of this new carboxymethylated hydroxytyrosol 8 has been investigated using DPPH radical scavenging test. The results showed that this new compound has an antioxidant activity similar to hydroxytyrosol. Description: L'articolo è disponibile sul sito dell'editore: http://www.sciencedirect.com Sun, 31 Dec 2006 23:00:00 GMT http://hdl.handle.net/2067/1881 2006-12-31T23:00:00Z