32022-28-9Relevant articles and documents
Antioxidant and Biological Activities of Hydroxytyrosol and Homovanillic Alcohol Obtained from Olive Mill Wastewaters of Extra-Virgin Olive Oil Production
Ricelli, Alessandra,Gionfra, Fabio,Percario, Zulema,De Angelis, Martina,Primitivo, Ludovica,Bonfantini, Veronica,Antonioletti, Roberto,Bullitta, Simonetta Maria,Saso, Luciano,Incerpi, Sandra,Pedersen, Jens Zacho
, p. 15428 - 15439 (2021/01/09)
Some constituents of the Mediterranean diet, such as extra-virgin olive oil (EVOO) contain substances such as hydroxytyrosol (HT) and its metabolite homovanillic alcohol (HA). HT has aroused much interest due to its antioxidant activity as a radical scavenger, whereas only a few studies have been made on the HA molecule. Both chemical synthesis and extraction techniques have been developed to obtain these molecules, with each method having its advantages and drawbacks. In this study, we report the use of tyrosol from olive mill wastewaters as a starting molecule to synthesize HT and HA, using a sustainable procedure characterized by high efficiency and low cost. The effects of HT and HA were evaluated on two cell lines, THP-1 human leukemic monocytes and L-6 myoblasts from rat skeletal muscle, after treating the cells with a radical generator. Both HT and HA efficiently inhibited ROS production. In particular, HT inhibited the proliferation of the THP-1 leukemic monocytes, while HA protected L-6 myoblasts from cytotoxicity.
Tunable microwave-assisted method for the solvent-free and catalyst-free peracetylation of natural products
Oliverio, Manuela,Costanzo, Paola,Nardi, Monica,Calandruccio, Carla,Salerno, Raffaele,Procopio, Antonio
supporting information, p. 2222 - 2233 (2016/11/17)
Background: The peracetylation is a simple chemical modification that can be used to enhance the bioavailability of hydrophilic products and to obtain safe and stable pro-drugs. Results: A totally green, solvent-free and catalyst-free microwave (MW)-assisted method for peracetylation of natural products such as oleuropein, alpha-hederin, quercetin and rutin is presented. By simply tuning the MW heating program, polyols with chemical diverse -OH groups or thermolabile functionalities can be peracetylated to improve the biological activity without degradation of the natural starting molecules. An evaluation of the process greenness was performed. Conclusion: The method is potentially universally applicable for green acetylation of hydrophilic biological molecules, potentially easily scalable for industrial applications, including pharmaceutical, cosmetic and food industry.
Expedient synthesis of hydroxytyrosol and its esters
Bovicelli, Paolo,Antonioletti, Roberto,Mancini, Silvia,Causio, Stefano,Borioni, Giorgio,Ammendola, Sergio,Barontini, Maurizio
, p. 4245 - 4252 (2008/03/13)
An efficient and friendly method for obtaining hydroxytyrosol from tyrosol, a component of olive waste, is reported. Hydroxytyrosol also may be obtained in the form of enzymatically convertible precursors (e.g., hydroxytyrosyl acetate), thus increasing the stability of the active principle. Copyright Taylor & Francis Group, LLC.