Basf Aktiengesellschaft

Basfaktiengesellschaft

Charles Schommer

Matthias Irgang

Klaus Ebel

Rainer Becker

Thomas Kuekenhoehner

Michael Huellmann

Karl Siegfried Brenner

Wolfgang Hoelderich

Toni Dockner

Juergen Schroeder

Harald Rust

Cyclic ketones of the general formula I ##STR1## where n is an integer from 4 to 6, are prepared by reacting aliphatic dicarbonitriles of the general formula II

Preparation of cyclic ketones

Muscone of the formula I ##STR1## is prepared by a process in which an open-chain 2,15-diketone of the general formula II

Preparation of muscone, intermediates for this preparation and

Ketones of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 independently of one another are each alkyl, cycyloalkyl, arylalkyl, aryl or hetaryl, and one or more of the radicals R.sup.1 and R.sup.2 carry one or more hydrogen atoms on the .alpha.-carbon atom, are prepared by reacting two carboxylic acids of the general formulae (IIa/IIb), R.sup.1 --COOH (IIa) and R.sup.2 --COOH (IIb) or by reacting a carboxylic acid R.sup.1 --COOH (IIa) and a ketone ##STR2## or by reacting a mixture of IIa, IIb and Ib, in the gas phase in the presence of a catalyst, by a process in which a catalyst is used whose active material contains at least 50% by weight of titanium dioxide having a specific surface area greater than 10 m.sup.2 /g.0.

Preparation of ketones

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Ludwigshafen, Germany

Charles Schommer