Basf Se Corporation

Timon Stork

Ralf Pelzer

Klaus Ebel

Stefan Rüdenauer

Karl Beck

Oliver Bey

Wolfgang Krause

Volker Hickmann

Gabriele Gralla

Stefan Ruedenauer

Margarethe Klos

Ralf Boehling

Bernhard Brunner

Martine Dehn

Bjoern Kaibel

Axel Salden

Michael Acker

Sven Reining

Sumana Roy

Dominik Herbrecht

Josias Jakobus Nieuwoudt

Alexander Zipp

Oskar Röder

Described is a process of making pseudoionone and hydroxy pseudoionone comprising the steps of (i) preparing a first aqueous mixture comprising first concentrations of acetone, citral and hydroxide, (ii) producing a second aqueous mixture by allowing to react for a reaction time the components of the first aqueous mixture and (iii) producing a third aqueous mixture by adding to the second aqueous mixture a second amount of hydroxide so that an additional amount of pseudoionone is formed in the third aqueous mixture. The invention further suggests an apparatus for making pseudoionone and hydroxy pseudoionone as well as to a respective process and use of said apparatus in making pseudoionone and hydroxy pseudoionone.

Process of making pseudoionone and hydroxy pseudoionone in aqueous mixtures comprising citral and acetone, comprising adding first and second amounts of hydroxide

The present invention relates to a method for preparing acetate compounds using ketene.

Preparation of acetate compounds via a ketene compound

The present invention relates to tetrahydropyranyl lower akyl esters and specifically to tetrahydropyranyl acetates, a method for preparation thereof using ketene and use thereof as fragrances and aroma substances.

Tetrahydropyranyl lower alkyl esters and the production of same using a ketene compound

The present invention relates to a method for preparing 2-substituted 4-hydroxy-4-methyltetrahydropyrans from starting materials comprising at least one 2-alkyl-4,4-dimethyl-1,3-dioxane.

Production of 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans from starting materials containing 2-alkyl-4,4-dimethyl-1,3-dioxanes

The present invention relates to the use of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate for use as aroma chemicals. The invention further relates to a process for the preparation of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate and the products obtainable by this process. The invention further relates to a fragrance or aroma substance composition which comprises isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetra-hydropyran-4-yl) acetate, a method for imparting, and/or boosting an odor or taste of a product, and also perfumed or aromatized products which comprise isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate.

Use of isomerically pure or highly isomer-enriched cis- or trans-(2-isobutyl-4-methyl-tetrahydropyran-4-yl)acetate

The present invention relates to a method for preparing tetrahydropyranyl esters from the corresponding 4-hydroxytetrahydropyran compounds by reaction with a ketene compound.

Method for producing tetrahydropyranyl esters

The present invention relates to a method for the production of 2-substituted 4-hydroxy-4-methyltetrahydropyrans from the acid-catalyzed reaction of 3-methylbut-3-ene-1-ol with an aldehyde, a stable odoriferous quality being achieved and avoiding off-odors that interfere with the odor sensation.

Production of 2-substituted 4-hydroxy-4-methyltetrahydropyrans having stable odoriferous quality

The invention relates to a method for producing 2-substituted 4-methyl-tetrahydropyrans of general formula (I) from starting materials containing at least one 2-substituted 4,4-dimethyl-1,3-dioxane of general formula (II).

Production of 2-substituted 4-methyl-tetrahydropyrans from starting materials containing 2-alkyl-4,4-dimethyl-1,3-dioxanes

The present invention relates to a process for the preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans.

Method for producing 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans, said method using recycling

The invention relates to a method for producing 2-substituted 4-hydroxy-4-methyltetrahydropyrans.

Method for producing 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans in a reactor cascade

The present invention relates to a process for the integrated preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans and of 2-substituted 4-methyltetrahydropyrans.

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Bürstadt Bobstadt, Germany

Timon Stork