Unitus DSpace The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. http://http://dspace.unitus.it:80 2013-05-21T13:22:09Z 2013-05-21T13:22:09Z Chemoselective and efficient carboxymethylation of the alcoholic chain of phenols by dimethyl carbonate (DMC). Bernini, Roberta Mincione, Enrico Crisante, Fernanda Barontini, Maurizio Fabrizi, Giancarlo Gentili, Patrizia http://hdl.handle.net/2067/1881 2011-06-28T13:21:08Z 2006-12-31T23:00:00Z 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 รจ disponibile sul sito dell'editore: http://www.sciencedirect.com 2006-12-31T23:00:00Z