Sodium hypophosphite has been used as an efficient hydrogen donor in the transfer hydrogenation of aliphatic and aromaticketones in the presence of [RuCl2(p-cymene)]2 and 2,2′-bipyridine in water. The corresponding alcohols were isolated in moderate to excellent yields (39–95 %). Good chemoselectivity was observed with ester, nitrile and halide functionalities in the ketones not being reduced. An
A process for the preparation of an ether compound is disclose, wherein the ether compound is prepared via a reaction from at least an alcohol (I) and an alcohol (II), optionally using a catalyst X, wherein alcohol (I) and alcohol (II) are forming a biphasic liquid system when mixed together; comprising at least the following steps: a) Producing an alcohol (I)/alcohol (II) emulsion by using as stabilizing species amphiphilic solid particles of nanometric dimension; optionally comprising a catalyst X; b) Proceeding to the reaction of the ether compound by setting temperature, and c) Isolating the ether compound.
Suggested is a antimicrobial agent comprising at least one acetophenone derivative of formula (I)
in which
R1
stands for hydrogen or methyl, and
R2
stands for hydrogen, hydroxyl or a -OCH3 group,
or a cosmetically or pharmaceutically acceptable salt thereof.
Suggested is a cosmetic composition comprising an anti-pollution agent selected from the group consisting of E/Z-2-benzylindene-5,6-dimethoxy-3,3-dimethylindan-1-one, sclareolide, purple coneflower pressed juice, ginger root CO2 extract or mixtures thereof, in a working amount sufficient for (a) reducing or preventing air pollution induced gene expression, and/or (b) reducing or preventing a gene expression induced or inducible by polycyclic aromatic hydrocarbons, and/or (c) reducing or preventing air pollution-induced or air pollution-inducible skin damage.
The present invention belongs to the fields of pharmaceuticals and cosmetics, and concerns on the one hand a medicament for the inhibition of and refers also on the cosmetic, non-therapeutic use for the treatment of hyperpigmentation, particularly induced by sun light radiation, preferably induced by visible light radiation.