Efficient scavenging of β-carotene radical cations by antiinflammatory salicylates

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

The radical cation generated during photobleaching of β-carotene is scavenged efficiently by the anion of methyl salicylate from wintergreen oil in a second-order reaction approaching the diffusion limit with k = 3.2 × 10 L mol s in 9:1 v/v chloroform-methanol at 23 °C, less efficiently by the anion of salicylic acid with 2.2 × 10 L mol s, but still of possible importance for light-exposed tissue. Surprisingly, acetylsalicylate, the aspirin anion, reacts with an intermediate rate in a reaction assigned to the anion of the mixed acetic-salicylic acid anhydride formed through base induced rearrangements. The relative scavenging rate of the β-carotene radical cation by the three salicylates is supported by DFT-calculations.
OriginalsprogEngelsk
TidsskriftFood & Function
Vol/bind5
Udgave nummer2
Sider (fra-til)291-294
Antal sider4
ISSN2042-6496
DOI
StatusUdgivet - 2014

ID: 101954154