Acetoxylation of arenes is an important reaction and an unmet need in chemistry. We report a metal-free, direct acetoxylation reaction using sodium nitrate under an anhydrous environment of trifluoroacetic acid, acetic acid, and acetic anhydride. Arenes (31 examples), with oxidation potentials (Eox, in V vs SCE) lower than benzene (2.48 V), were acetoxylated with good yields and regioselectivity. A
芳烃的乙酰氧基化是一个重要的反应,也是化学中未满足的需求。我们报告了在三氟乙酸、乙酸和乙酸酐的无水环境下使用硝酸钠进行的无金属直接乙酰氧基化反应。芳烃(31 个实例)的氧化电位(E ox,单位为 V vs SCE)低于苯(2.48 V),以良好的产率和区域选择性被乙酰氧基化。提出了一种逐步的单电子转移机制。
Oxidative Färbemittel
申请人:Henkel AG & Co. KGaA
公开号:EP2301520A2
公开(公告)日:2011-03-30
Gegenstand der vorliegenden Anmeldung sind Mittel zur oxidativen Färbung keratinischer Fasern, insbesondere menschlicher Haare, enthaltend in einem kosmetisch akzeptablen Träger mindestens ein Oxidaionsfarbstoffvorprodukt sowie eine Wirkstoffkombination aus
(a) mindestens einer basischen Aminosäure,
(b) Pyrrolidoncarbonsäure oder einer ihrer physiologisch verträglichen Salze,
wobei die Mittel im Wesentlichen frei von sauren Aminosäuren sind.
A liquid hair dye composition comprising components (A), (B) and (C), wherein a content of the component (A) is 1.5 mass% or more, (A) an azo dye selected from the group consisting of the following formulae (A-1), (A-2) and (A-3); (B) a surfactant with an HLB of 7 or more, selected from the group consisting of anionic surfactants, nonionic surfactants and amphoteric surfactants; and (C) water.
Composition and method for treating keratin fibers with flash evaporation
申请人:Henkel AG & Co. KGaA
公开号:US10098826B2
公开(公告)日:2018-10-16
A cosmetic product includes a cosmetic preparation including, in relation to the total weight thereof, 35 to 85 wt % polar solvent and 0.001 to 10 wt % oxidation dye precursor. The cosmetic product also includes b) a device for flash evaporation of the cosmetic preparation a). A method incorporates the use of the corresponding product and particularly the use of the cosmetic preparation a) as a process material in a device for flash evaporation.
一种化妆品包括一种化妆品制剂,就其总重量而言,包括 35 至 85 wt % 的极性溶剂和 0.001 至 10 wt % 的氧化染料前体。该化妆品还包括 b) 用于闪蒸化妆品制剂 a) 的装置。一种方法包含相应产品的使用,特别是将化妆品制剂 a) 用作闪蒸装置中的加工材料。
Compositions and methods for coloring keratinic fibers
申请人:Henkel AG & Co. KGaA
公开号:US10179093B2
公开(公告)日:2019-01-15
Cosmetic compositions and methods for changing the color of keratinic fibers are provided herein. In an embodiment, a cosmetic composition for lightening the color of keratinic fibers includes at least two separately packaged formulations (A) and (B), which are mixed immediately prior to application to give an application mixture. The formulation (A) includes at least one dye chosen from the group of oxidation dye precursors, direct dyes, or a combination thereof. The composition (B) is a flowable composition including water and at least one oxidizing agent. Formulation (A) has been packaged in a water-soluble film including, based on its total weight, at least about 60% by weight of a polymer mixture having a multimodal molecular weight distribution.