| abstract |
PROBLEM TO BE SOLVED: To provide a merocyanine derivative for cosmetic use. [Solution] The following formula: [Chemical 1] [Wherein, R 1 and R 2 are independently of each other a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, a cyclo-alkyl group having 3 to 8 carbon atoms, or unsubstituted or having 1 to 5 carbon atoms. Represents an aryl group having 6 to 20 carbon atoms substituted by an alkyl group of 1 or 5 or an alkoxy group having 1 to 5 carbon atoms, or R 1 and R 2 together with a nitrogen atom bonded to them. To form a — (CH 2 ) m ring, which is uninterrupted or interrupted by an —O— group or by an —NH— group, and R 3 is a cyano group, —COOR 5 group, — CONHR 5 radical, -COR 5 group, or represents -SO 2 R 5 group, R 4 represents a cyano group, -COOR 6 group, -CONHR 6 group, -COR 6 group, or -SO 2 R 6 group, R 5 and R 6 are independently of each other 1 carbon atom Represents an alkyl group having 2 to 22 carbon atoms, or an aryl group having 6 to 20 carbon atoms which is unsubstituted or substituted by an alkyl group having 1 to 5 carbon atoms, or R 3 and R 4 together, or , R 5 and R 6 together form a 5- to 7-membered monocyclic, carbocyclic or heterocyclic ring, wherein Z 1 and Z 2 are independently of each other — (CH 2 ) Represents a l group, which is uninterrupted or interrupted by an —O— group, an —S— group or an —NR 7 — group and / or unsubstituted or having 1 to Substituted with 5 alkyl groups, R 7 represents an alkyl group having 1 to 5 carbon atoms, l represents 1 to 4, m represents 1 to 7, n represents 1 to 4, n = time of 2, R 1, R 5 or R 6 is a divalent alkyl group, walk , R 1 and R 2 together with the nitrogen atom connecting them - (CH 2) m forms a ring, when n = 3, R 1, R 5 or R 6 is a trivalent alkyl group When n = 4, R 1 , R 5 or R 6 represents a tetravalent alkyl group, and R 1 and R 2 in the formula (1) do not represent a hydrogen atom at the same time. The use of merocyanine derivatives represented by the formulas in protecting human and animal hair and skin from UV radiation is described. |