Basf Aktiengesellschaft

Heinz Etzrodt

Manfred Stroezel

Hagen Jaedicke

Carsten Oost

Dietmar Weller

Gerd Kaibel

Bernhard Bockstiegel

Klaus Reimer

Udo Rheude

Joaquim Henrique Teles

Hartmut Hibst

Norbert Rieber

Andreas Ansmann

Walter Dobler

Dirk Demuth

Klaus Breuer

Lothar Laupichler

Jochem Henkelmann

Joachim Paust

Hansgeorg Ernst

Thomas Krug

Alois Kindler

Wolfgang Krause

Werner Aquila

Bernhard Schulz

Mathias Haake

Wolfram Burst

Susanne Stutz

Luise Spiske

Christian Tragut

Franz Josef Br&ouml;cker

Wulf Kaiser

Peter Munster

Ulrich Kammel

Otto Worz

Arno Kochner

Roland Pox

Stefan Kaeshammer

Armin Bertram

Gunter Dauwel

Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH /KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetates diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.

Preparation of higher &agr;, &bgr;-unsaturated alcohols

Preparation of C10-C30-alkenes by partial hydrogenation of alkynes over fixed-bed supported palladium catalysts

Process for the continuous preparation of unsaturated ketones of the formula I

Continuous preparation of unsaturated ketones

Process for preparing unsaturated ketones

Process for preparing higher unsaturated ketones

Method for producing enol ethers

Unsaturated ketones of the formulae Ia and Ib

Preparation of unsaturated ketones

A process for the preparation of acetates of alcohols or phenols, in particular linalyl acetate, by causing alcohols or phenols to react with ketene in the presence of a catalyst, wherein the reaction is carried out using approximately equimolar amounts of linalool and ketene in the presence of a zinc salt of a carboxylic acid, or alternatively in the presence of a zinc compound which forms zinc acetate under the conditions of the reaction, and with vigorous mixing of the reaction mixture. Using this process, linalyl acetate and numerous other acetates interesting as perfumes or active agents can be obtained to a good degree of purity in yields of more than 90% of theory and in very good space-time yields.

Preparation of acetates of hydroxyl group-containing organics, in

A process for preparing .gamma.,.delta.-unsaturated ketones of the general formula I ##STR1## by reacting an allyl alcohol of the general formula II ##STR2## in which R.sup.1 is H or a hydrocarbon radical having 1 to 20 carbon atoms, with diketene or an alkyl acetoacetate of the general formula III ##STR3## in which R.sup.2 is alkyl having 1 to 4 carbon atoms in an unmodified or modified Carroll reaction in the presence of an aluminum catalyst, wherein aluminum compounds which are stable liquids at room temperature, or a mixture of such aluminum compounds, which comprise at least one radical formed from an alkyl acetoacetate and 1 or 2 alkoxy radicals, or else comprise exclusively radicals formed from alkyl acetoacetates, which are esterified with sec-butanol or isobutanol, or else are esterified with at least two different alcohols, are used as aluminum catalyst. Also claimed are the novel mixtures of aluminum compounds which comprise radicals which are formed exclusively from alkyl acetoacetates and are esterified with at least two different alkanols, and the batchwise and continuous preparation of the liquid aluminum catalysts.

Preparation of .gamma.,.delta.-unsaturated ketones by the Carroll

A process for preparing .gamma.,.delta.-unsaturated ketones by

Preparation of .gamma., .delta.-unsaturated ketones by the carroll

A process for preparing polyenecarbonyl compounds having a high all-E content and their acetals or ketals by aldol condensation or Horner-Emmons reaction comprises carrying out the reaction, for the purposes of the preferred formation of a double bond of E configuration and in order to maintain the E configuration of the double bonds in the stating compounds as completely as possible, in the presence of oxygen or an oxygen-inert gas mixture or nitric oxide or a nitric oxide-inert gas mixture and/or in the presence of specific stable radicals and/or in the presence of quinones or quinone derivatives.

Preparation of polyenecarbonyl compounds having a high content of the

Growing community of inventors

Neustadt, Germany

Heinz Etzrodt