A non-irritating base component useful for cosmetics and topical preparations consisting of 2,6,10,15,19,23-hexamethyltetracosane having a high stability and being very safe for use on skin are hereby disclosed. Said component is synthesized by (a) preparing diacetylene dialcohol by reacting at least one ketone selected from the group consisting of 6,10-dimethylundecan-2-one, 6,10-dimethylundeca-3,9-dien-2-one, 6,10-dimethylundeca-5,9-dien-2-one, 6,10-dimethylundeca-5,10-dien-2-one and 6,10-dimethylundeca-3,5,9-trien-2-one, with acetylene and then subjecting the reaction product to the oxidation coupling, or by reacting ketone with diacetylene and (b) hydrocracking the diacetylene dialcohol directly or after hydrogenation.
一种非刺激性的基础组分,适用于化妆品和局部制剂,由2,6,10,15,19,23-六甲基
四十四烷组成,具有高稳定性,非常安全用于皮肤。所述组分通过以下步骤合成:(a)通过将至少选自6,10-二甲基
十一烷酮、6,10-二甲基
十一烷-3,9-二烯-2-酮、6,10-二甲基
十一烷-5,9-二烯-2-酮、6,10-二甲基
十一烷-5,10-二烯-2-酮和6,10-二甲基
十一烷-3,5,9-
三烯-2-酮之一的酮和
乙炔反应制备二
乙炔二醇,然后将反应产物氧化偶联,或通过将酮与二
乙炔反应;(b) 直接或在氢化后加氢裂解二
乙炔二醇。