Abstract
Flavonoid derivative with extended cinnamic acid moiety was synthesized using Baker‐Venkataraman reaction. The compound shows interesting UV absorption properties which make it a good UVA absorber. A bathochromic shift of 18 nm was observed when the size of cinnamic acid segment was increased by one styrylogous extension.
Highlights
Flavonoids play an important role in biological processes in plants and other biological species [1]
Avonoids are known for their ability to act as UV-absorbers and radical quenching compounds [10, 11]. Because of this important property, avonoids are exploited by plants to protect them from the sun UV radiation. is use could be utilized in the protection of human hair and skin from UV radiation
It is well known that exposure to UV radiation can damage skin and hair bers [12, 13]
Summary
Flavonoids play an important role in biological processes in plants and other biological species [1]. Is means that avone 1 would protect better against UVB and against hair protein loss, whilst 2-styryl-4H-chromen-4-one 2 would protect better against UVA radiation and hair color changes. One of the most common methods used to prepare avonoids involves acylation of o-hydroxyacetophenone with an aromatic acid chloride yielding an aryl ester.
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