Compounds of the formula R-C(R2)=C(R3)-C(R4)=C(R5)-R wherein R is -CHO, -CH(OR6)2, 1,3-dioxolan-2-yl, 4-methyl-1,3-dioxolan-2-yl or 1,3-dioxan-2-yl; R2, R3, R4 and R5 independently are hydrogen, methyl or ethyl; and R6 is C1-8 alkyl are highly useful as cosmetic active ingredients, e.g., as hair dyes and skin tanning agents. Compositions of these compounds with other active ingredients such as dihydroxyacetone are also quite effective.
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机译:式为RC(R2)= C(R3)-C(R4)= C(R5)-R的化合物,其中R为-CHO,-CH(OR6)2、1,3-二氧戊环-2-基,4-甲基-1,3-二氧杂-2-基或1,3-二氧杂-2-基; R2,R3,R4和R5独立地是氢,甲基或乙基; R 6是C 1-8烷基,作为化妆品活性成分,例如染发剂和皮肤晒黑剂非常有用。这些化合物与其他活性成分(例如二羟基丙酮)的组合物也非常有效。
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