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:
Mar. 13, 1990
Filed:
Nov. 18, 1985
Werner Hoffmann, Neuhofen, DE;
Dieter Degner, Dannstadt-Schauernheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A simple process for preparing 1-(4-hydroxy-phenyl)-butan-3-one, a sought-after natural aromatic, in a pure form and in good yield from easily accessible starting materials, wherein a 4-tert-alkoxy-benzaldehyde is condensed, under alkaline conditions, to give a novel 1-(4-tert.-alkoxy-phenyl)-but-1-en-3-one, the latter is hydrogenated, during or after this condensation, to give a novel 1-(4-tert.-alkoxy-phenyl)-butan-3-one, and isobutene or 2-methyl-but-1(2)-ene is eliminated from this compound in the presence of a catalytic amount of an acid. The novel intermediates have the general formula ##STR1## where R is H or CH.sub.3 and the broken line may or may not be an additional carbon-carbon bond.