BENZOXAZOL DERIVATIVES, METHODS FOR THEIR PREPARATION, COSMETIC COMPOSITIONS CONTAINING SUCH COMPOUNDS, USE OF SUCH COMPOUNDS AS UV-A FILTERS AND METHOD OF PROTECTING THE SKIN AND HAIR AND METHOD OF STABILIZING COSMETIC COMPOSITIONS

摘要

Benzoxazole derivatives represented by the formula IMAGE wherein R is in the 5- or 6-position and is hydrogen or an alkyl group containing 1 to 4 carbon atoms and R1 and R2 are independently hydrogen, an alkyl group containing 1 to 4 carbon atoms or a group having the formula-(XO)n-H, wherein X is ethylene or ethylene substituted by methyl or ethyl and which contains a total of 2 to 4 carbon atoms and n is an integer of 1 to 10, at least one of R1 and R2 being other than hydrogen, or R1 and R2, taken together with the nitrogen to which they are attached, form a 5- to 7-membered, saturated heterocyclic ring, and cosmetically acceptable salts thereof. The subject compounds, in combination with a suitable cosmetic carrier, are useful as radiation absorbers, i.e., UV-A filters.