29264-27-5Relevant academic research and scientific papers
External preparation for skin
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, (2008/06/13)
An external preparing for skin comprising one or more than two types of 2-hydroxy benzoic acid derivative and/or salt thereof represented by the following formula: STR1 wherein R is an alkoxy group or alkyl group in the formula. The external preparation for the skin according to the present invention has a suppression effect on melanine generation by inhibition of tyrosinase activity. Accordingly, an excellent bleaching effect based upon the suppression of chromatosis and a high degree of safety can be obtained.
O- and N-Alkylsubstituted 2-(2'-Hydroxyphenyl)-benzimidazoles and -1,3,4-Oxadiazoles as Complexing and Extracting Agents for Copper-II-Ions
Beger, J.,Wagner, G.,Uhlig, E.,Dinjus, U.
, p. 708 - 718 (2007/10/02)
2-(2'-Alkoxyphenyl)-benzimidazoles 1, 1-alkyl-2-(2'-hydroxyphenyl)-benzimidazoles 2, 2-(2'-hydroxy-4'-alkoxyphenyl)-benzimidazoles 3, 2-(2',4'-dialkoxyphenyl)-benzimidazoles 4 and 1-alkyl-2-(2'-hydroxy-5'-nitrophenyl)-benzimidazoles 7 are synthesized by condensation of 2-hydroxybenzoic acid derivatives and o-phenylendiamine or its derivatives.Alkyl chains (C4, C8 or C12) are introduced by alkylation before or after the ring closure in order to increase the solubility of the reagent in toluene or n-octane.Furthermore the extraction properties of the benzimidazoles are investigated.Also some new analogous compounds of the benzothiazole and the 1,3,4-oxadiazole series were synthesized.
The Coordinative Behaviour of N-Substituted 2-(Δ2-Imidazolin-2-yl)-phenols as Metal Extractants
Beger, J.,Wagner, G.,Dinjus, U.,Goerls, H.,Uhlig, E.,Sieler, J.
, p. 211 - 224 (2007/10/02)
N-Substituted 2-(Δ2-imidazolin-2-yl)-phenols (R4NNOH) are obtained by the reaction of N-alkyl diaminoethane-1,2 and 2-hydroxybenzoic acid esters.In contrast to many other copper(II) complexes with the donor set N2O22- (A),
