Author's Organization：Department of Nutritional Science, Okayama Prefectural University Department of Chemistry, Kyoto University of Education Department of Applied Science, Okayama University of Science Department of Applied Science, Okayama University of Science Institute for Chemical Research, Kyoto University Department of Applied Science, Okayama University of Science
Arbutin cinnamate was synthesized from arbutin (4-hydroxy-phenyl β-D-glucopyranoside) and vinyl cinnamate by regioselective transesterification with a bacterial lipase in acetonitrile. The product was identified by NMR and FAB-MS analyses. These spectra showed that one ester bond was formed between the primary alcohol moiety of the D-glucose of arbutin and the carboxyl residue of cinnamic acid. Furthermore, plant pigments such as isoquercitrin (quercetin 3-O-β-D-glucopyranoside) and callistephin (pelargonidin 3-O-β-D-glucopyranoside) were also converted to their corresponding cinnamate esters in the same manner.
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