The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1992
Filed:
Jun. 22, 1987
Walter Gramlich, Edingen-Neckarhausen, DE;
Wolfgang Lengsfeld, Limburgerhof, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Cyclopentanones monoalkylated in the 2-position and of the general formula I ##STR1## where R.sup.1 is a branched or straight-chain aliphatic group of 2 to 12 carbon atoms and R.sup.2 to R.sup.7 may be identical or different and are each hydrogen or alkyl of 1 to 5 carbon atoms, are prepared by a process in which a cyclopentanone of the general formula II ##STR2## or a corresponding cyclopentenone, is reacted with an aldehyde of the general formula III ##STR3## at from 80.degree. to 280.degree. C. in the presence of hydrogen in an autoclave, over a catalyst which contains, as active components, on the one hand an oxide or a phosphate of magnesium, aluminum, titanium or zinc or of one of the rare earth metals, and on the other hand a noble metal of group VIII of the periodic table, preferably palladium. The 2-alkylcyclopentanones obtainable according to the invention in a simple single-stage reaction with virtually complete conversion and high selectivity are important as intermediates and in particular as scents.