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Synthesis, characterization and free radical scavenging properties of rosmarinic acid fatty esters

Lecomte J., Lopez Giraldo L.J., Laguerre M., Baréa B., Villeneuve P.. 2010. Journal of the American Oil Chemists' Society, 87 (6) : p. 615-620.

DOI: 10.1007/s11746-010-1543-8

The hydrophobation of rosmarinic acid with saturated aliphatic primary alcohols of various chain lengths (methanol to eicosanol) was achieved via an acidcatalyzed esterification in the presence of a highly acidic sulfonic resin. The resulting alkyl rosmarinates were isolated, characterized and their global free radical scavenging activity was determined by the 2,2-diphenyl-1-picrylhydrazyl method in the stationary state. Only the dodecyl ester showed a stronger activity than rosmarinic acid.

Mots-clés : ester; estérification; acide gras; acide phénolique; alcool; radical libre; antioxydant; extrait d'origine végétale; acide rosmarinique

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