Hoechst Celanese Corporation

Hoechst Aktiengesellschaft

Celanese Gmbh

Aventis Research & Technologies Gmbh & Co Kg

Aventis Corporation Gmbh

Ahmed M Tafesh

Olan S Fruchey

Matthias Beller

Charles B Hilton

George Kvakovszky

Joseph A McDonough

Charlet R Lindley

Graham N Mott

Richard Vicari

Christoph Naumann

Bernd Scharbert

Richard Walter Fischer

B Frank Wood

Hans-Jerg Kleiner

Wolfgang Anton Herrmann

Gerd Reinhardt

Kenneth G Davenport

Dieter Regnat

Christian Kohlpaintner

Vera Friderichs

Jochen Krause

H Ramos, Jr

G N Mott

J R Durrwachter

Sambasivarao Kotha

Graham M Mott

Process for telomerizing dienes

Disclosed and claimed are oxidation reactions involving, as a catalyst, a bis- and/or tris-(.mu.-oxo)-dimanganese complex salt of the formula I

Process for the oxidation of organic compounds in the presence of bis-

The invention relates to a process for preparing monofunctional, bifunctional or polyfunctional aromatic olefins of the formula (I) ##STR1## wherein a palladium compound of the formula (IV) ##STR2## is used as a catalyst in the preparation of the compounds of the formula (I).

Processs for preparing aromatic olefins using palladacycle catalysis

Bleach systems comprising bis- and tris(.mu.-oxo)dimanganese complex salts as catalyst Bis- and tris(.mu.-oxo)dimanganese complex salts of the formula

Bleach systems comprising bis- and tris(.mu.-oxo)dimanganese complex

A process for preparing chiral epoxides using chiral manganese triazanonane complexes as oxidation catalysts. These catalysts have the general formula

Process for preparing chiral epoxides using chiral manganese

The chiral manganese-triazonone complex of the general formula (I) is disclosed:

Chiral manganese triazononane complexes

The present invention relates to a process for preparing aromatic amines by reacting an aromatic nitro compound with carbon monoxide in a solvent mixture comprising water and a water-insoluble organic solvent by means of a catalyst comprising palladium and a water-soluble phosphine under a pressure of from 5 to 300 bar and at a temperature of from 50 to 200.degree. C., and separating the aqueous phase and the organic phase.

Process for preparing aromatic amines

The present invention relates to sulfonated diphosphines of the formula (I) ##STR1## where M is hydrogen, ammonium, a monovalent metal or the equivalent of a polyvalent metal, a, b, c and d are each 0 or 1, with the proviso that a+b+c+d is an integer from 1 to 4, Ar is an m-(MSO.sub.3)--C.sub.6 H.sub.4 radical and M is as defined above, n is 0, 1 or 2, Ph is a phenyl radical, R.sup.1 and R.sup.2 are identical or different and are each an alkyl radical having from 1 to 10 carbon atoms or a cycloaliphatic radical having from 5 to 10 carbon atoms in the ring, and a process for their preparation.

Sulfonated diphosphines and a process for their preparation

Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 600.degree. C.

Process for preparing arylketoamines

Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 60.degree. C.

The present invention provides new polymer compositions which contain novel substituted pyrazines or pyrazine derivatives ('NPD') which are functional and have useful application as a monomer (co-monomer) for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined herein.

Polymer compositions containing substituted pyrazines

An arylisonitrosoalkanone is hydrogenated in the presence of a noble metal catalyst and a weak carboxylic acid to form an arylalkanolamine which is then hydrogenated in the presence of a strong mineral acid and the transition metal catalyst to form an arylalkylamine. When the arylisonitrosoalkanone is an isonitrosoacetophenone, the isonitrosoacetophenone is prepared by one of two methods. In the first method, a substituted or an unsubstituted isonitrosoacetophenone is prepared from a corresponding substituted or unsubstituted acetophenone by oxidizing the acetophenone to form a substituted or an unsubstituted phenylglyoxalacetal in a reactor, hydrolyzing the phenylglyoxal acetal in the same reactor to form a corresponding substituted or unsubstituted phenylglyoxal, and condensing the phenylglyoxal with hydroxylamine or a salt thereof in the same reactor to form the substituted or unsubstituted isonitrosoacetophenone. Alternatively, the substituted or unsubstituted isonitrosoacetophenone is prepared from the corresponding substituted or unsubstituted acetophenone by reacting the substituted or unsubstituted acetophenone in water with a source of a nitrosonium ion in the presence of a strong acid to form a corresponding substituted or unsubstituted phenylglyoxal, and condensing the phenylglyoxal with hydroxylamine or a salt thereof to form the substituted or unsubstituted isonitrosoacetophenone. In either method, any strong acid that might be present in the reaction mass following the condensation to the isonitrosoacetophenone shall be removed therefrom prior to initiating the hydrogenation of the isonitrosoacetophenone to the arylalkanolamine.

Process for preparing substituted and unsubstituted arylalkylamines

Acylamides or amine acylate salts of arylalkanolamines are prepared by reacting an arylisonitrosoalkanone with hydrogen and a carboxylic acid, carboxylic acid anhydride or carboxylic acid ester or mixture thereof in the presence of a transition metal catalyst; optionally the product is converted to the corresponding arylalkanolamine hydrochloride salt by reaction of the acylamide or amine acylate salt of the arylalkanolamine with hydrogen chloride in a C.sub.1 -C.sub.3 alkyl alcohol.

Growing community of inventors

Corpus Christi, TX, United States of America

Ahmed M Tafesh