Cashew-waste possible bio-degradable sunscreen in our future

With current concerns over the use of fossil resourcesfor chemical synthesis of functional molecules and the effect ofcurrent UV absorbers in sunscreens have on the ecosystem, wedescribe a xylochemical synthesis of different classes of aro-matic UV absorbers utilizing cashew nut shell liquid as a non-edible bio-renewable carbon source. Hydroxybenzophenones,xanthones, triazines, and flavones were synthesized startingfrom cardanol or anacardic acid. Several compounds exhibitedfavorable UVA and UVB absorption characteristics.

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