Noxell Corporation

The Procter Gamble Company

Armin Osan

Markus Speckbacher

Ingo Reinhold Weber

Heike Gertrud Abel

Garry Steven Garrett

Wolfram Geibel

Ingo Weber

Bryan Patrick Murphy

John Michael Gardlik

A process for the preparation of 2-substituted-1,4-benzenediamines, a cosmetically acceptable salt thereof, or mixture thereof. The process according to the present invention is a particularly cost effective process in that it avoids sophisticated chemical steps which requires special equipment or expensive catalysts and in that it comprises a recycling step of one of the starting materials, namely the 2-substituted aniline.

Process for the preparation of 2-substituted-1,4-benzenediamines and salts thereof

A telescoping process for the preparation of 2-methoxymethyl-p-phenylenediamine, a cosmetically acceptable salt thereof, or mixture thereof. The process according to the present invention is a particularly cost effective process in that it avoids sophisticated chemical steps which requires special equipment or expensive catalysts and in that it comprises a recycling step of one of the starting materials, namely 2-methoxymethylaniline.

Telescoping synthesis of 2-methoxymethyl-p-phenylenediamine

A telescoping process for the preparation of 2-methoxymethyl-p-phenylenediamine, a cosmetically acceptable salt thereof, or mixture thereof. The process according to the present invention is a particularly cost effective process in that it avoids sophisticated chemical steps which requires special equipment or expensive catalysts and in that it comprises a recycling step of one of the starting materials, namely 2-hydroxymethylaniline.

Telescoping synthesis of 2-methoxymethyl-P-phenylenediamine

A compound of formula (I) or (II) or (III): wherein R, R, R, R', R&#x2033; and R&#x2033;&#x2032; are as defined herein. This compound can be used in a composition for the dyeing of fibers.

Azo direct dyes and method for dyeing hair using these dyes

1-hexyl-1H-pyrazole-4,5-diamine hemisulfate, as represented in formula (IX-a), and its use in oxidative dyeing composition. This pyrazole salt was found to combine good stability as raw material and good shade intensity with a range of common couplers when formulated in hair dyeing composition. 

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1-hexzl-1H-pyrazole-4,5-diamine hemisulfate, and its use in dyeing compositions

A telescoping synthesis of 5-amino-4-nitroso-1-alkyl-1H-pyrazole salt derivatives of formula (I), the compound (I) itself, and its use as an intermediate in the fabrication of 1-alkyl-4,5-diaminopyrazole salts of general formula (IX). The compounds of formula (IX) can be used as precursor dyes in oxidative hair dye compositions.  R is a mono- or poly-substituted or unsubstituted, straight or branched, saturated or mono- or poly-unsaturated, alkyl group. HZ and HZ' are organic or mineral acids.

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Bebra, Germany

Armin Osan