Monsanto Company

Monsanto Chemical Company

Other

Albert S Chan

Scott A Laneman

Donald E Morris

James P Coleman

Grace Mary Wagner

John R Wiedemann

Samuel L Hull

W Eamon Carroll

Process for preparing .alpha.-arylpropionic acids by catalytically asymmetrically hydrogenating .alpha.-arylpropenoic acids prepared from .alpha.-aryl ketones.

Method for preparing .alpha.-arylpropionic acids

Process for preparing .alpha.-arylpropionic acids by catalytically asymmetrically hydrogenating .alpha.-arylpropenoic acids utilizing an asymmetric hydrogenation catalyst at low temperatures and, optionally, at high pressures.

Asymmetric catalytic hydrogenation of .alpha.-arylpropenoic acids

A ruthenium-phosphine complex represented by the formula:

Ruthenium-binap asymmetric hydrogenation catalyst

Ruthenium-BINAP asymmetric hydrogenation catalyst

Ru(BINAP) diketonate complexes manifest asymmetric hydrogenation catalytic activity with high reaction and conversion rates.

Ruthenium(II)-BINAP diketonate complexes

A dentifrice composition is disclosed which contains dicalcium phosphate dihydrate and other common ingredients and a zinc sodium tripolyphosphate compound.

Fluoride stability in dicalcium phosphate dihydrate composition

A dentifrice composition is disclosed which contains an effective amount of a zinc-alkali metal tripolyphosphate compound for the control of dental plaque and dental calculus.

Zinc tripolyphosphate compounds as anticalculus and antiplaque agents

Asymmetric catalytic hydrogenation of .alpha.-arylpropenic acids

A process for the production of sodium phenylpyruvate from calcium phenylpyruvate wherein calcium phenylpyruvate is contacted with a sodium carbonate salt in an inert atmosphere.

Process for preparing sodium phenylpyruvate from calcium phenylpyruvate

A process of preparing chiral alcohols by the asymmetric catalytic hydrogenolysis of epoxides using rhodium or ruthenium catalysts containing chiral phosphine ligands.

Asymmetric hydrogenolysis of epoxides

Calcium carbonate particles are coated with a pyrophosphate derivative. The invention includes the coated particles, method of preparation and use in oral hygiene products.

Pyrophosphate coating process for calcium carbonate dental abrasives

The dicarbonylation product of 1,4-disubstituted-2-butene is useful as intermediate in the production of adipic acid, hexamethylenediamine and 1,6-hexanediol. It is produced by carbonylating a solution of the disubstituted butene in a polar, aprotic non-basic solvent at 80.degree.-140.degree. C. in the presence of a catalyst comprised of a halide of the transition metal. The dicarbonylation product is converted to adipic acid by hydrogenation followed by hydrolysis.

Production of adipic acid from 1,4-disubstituted-2-butene

The dicarbonylation product of 1,4-dialkoxy substituted-2-butene is useful as intermediate in the production of adipic acid, hexamethylenediamine and 1,6-hexanediol. It is produced by carbonylating a solution of the dialkoxy substituted butene in a polar, aprotic non-basic solvent at 80.degree.-140.degree. C. in the presence of a catalyst comprising a halide of the transition metal.

Production of hex-3-enedioate esters from 1,4 dialkoxy butenes

Formaldehyde is reacted with hydrogen and carbon monoxide with rhodium catalyst in the presence of phosphine ligands having electron-withdrawing substituents, obtaining high selectivity to glycol aldehyde with a stable catalyst system.

Hydroformylation process to prepare glycolaldehydes

Formaldehyde is reacted with hydrogen and carbon monoxide in the presence of certain rhodium catalysts and basic organic amine compositions which promote the formation of glycol aldehyde.

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St. Louis, MO, United States of America

Albert S Chan