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:
Apr. 08, 2014
Filed:
Oct. 14, 2010
Andreas Lanver, Mannheim, DE;
Klaus Ebel, Lampertheim, DE;
Karl Beck, Östringen, DE;
Ralf Pelzer, Fürstenberg, DE;
Jörg Botzem, Limburgerhof, DE;
Ulrich Griesbach, Mannheim, DE;
Andreas Lanver, Mannheim, DE;
Klaus Ebel, Lampertheim, DE;
Karl Beck, Östringen, DE;
Ralf Pelzer, Fürstenberg, DE;
Jörg Botzem, Limburgerhof, DE;
Ulrich Griesbach, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) in which Ris bonded to the phenyl ring in the m- or p-position and is C-C-alkyl, and R, R, Rand R, independently of one another, are hydrogen or methyl, wherein an unsubstituted phenylalkanol of the formula (II) in which R, R, Rand Rhave the meanings given under formula (I) is alkylated together with a C-C-alkyl halide of the formula (III)R-Hal  (III),in which Rhas the meaning given under formula (I) and Hal is halogen, in the presence of a Friedel-Crafts catalyst to give an m- or p-alkyl-substituted phenylalkanol of the formula (I), then the reaction mixture is worked-up and the desired m- or p-alkyl-substituted phenylalkanol of the formula (I) is separated off, the other formed by-products are returned to the reaction mixture and these are isomerized in the presence of a Friedel-Crafts catalyst to give the desired m- or p-alkyl-substituted phenylalkanol. From the m- or p-alkyl-substituted phenylalkanols of the formula (I), it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which play an interesting role as fragrances and aroma chemicals.