Symrise Gmbh & Co Kg

Symrise Ag

Stephan Hillers

Horst Surburg

Oskar Koch

Heiko Oertling

Leslie C Smith

Keith J McDermott

Steffen Sonnenberg

Ralf Bertram

Harry Erfurt

Ute Rohde

Claudia Goemann

Gerald Reinders

Karl Sparkuhle

The present invention relates to the compound L-menthyl-N-(2-hydroxyphenyl)carbamate, which is effective against body perspiration odor bacteria, in particular against armpit perspiration odor bacteria, and simultaneously effective as an antioxidant, of the following formula, a method for the production thereof and its use. 

L-menthyl-N-(2-hydroxyphenyl)carbamate

This invention relates to odor neutralizers comprising esters of the formula (I) wherein Ris an alkyl radical with 1 to 4 carbon atoms which can optionally contain a double bond; Ris a hydrogen or an alkyl radical with 1 to 3 carbon atoms which can optionally contain a double bond; Ris a hydrogen or a methyl radical substituted by the alkyl radicals Rand R; Ris a hydrogen, a methyl radical or an acyloxy radical of the general formula O&#x2014;CO&#x2014;Rwherein Rhas the abovementioned meaning; R, R, R, Rand Rare identical or different and is hydrogen or methyl; Ris a hydrogen and Rand Rcan together represent a single carbon bond or a methylene or an ethylene bridge,with the proviso that i) in the case of cyclohexyl esters in which R=methyl, R=isopropyl, R=methyl and R=hydrogen, the substituents Rand Rare arranged in a cis relationship to each other; ii) in the case of cyclohexyl esters in which R=isopropenyl, R=methyl and R=hydrogen, the substituent Ris an alkyl group with at least two C atoms; iii) in the case of acyclic monofunctional esters, the substituent Ris an alkyl group with at least two C atoms; and iv) in the case of cyclohexyl esters in which R, R, R=hydrogen and R, R, R=methyl, the substituent Ris methyl, ethyl, propyl or 1-propen-1-yl.

Odor neutralizers

Phenylene-bis-benzimidazole-tetrasulfonic acid disodium salt which is largely free from impurities can be prepared by reacting o-phenylenediamine with terephthalic acid and chlorosulfonic acid in the presence of strong acids with a reaction time of 10 to 15 hours.

Process for the preparation of phenylene-bis-benzimidazole-tetrasulfonic acid disodium salt

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Holzminden, Germany

Stephan Hillers