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:
Jun. 07, 1994
Filed:
Mar. 02, 1993
Applicant:
Inventors:
Michael Karcher, Dossenheim, DE;
Horst Zimmermann, Mannheim, DE;
Jochem Henkelmann, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568653 ; 568652 ; 568766 ; 568772 ; 568650 ; 568763 ;
Abstract
The preparation of pyrocatechol monoethers or pyrocatechols of the formula Ia or Ib respectively ##STR1## ( R.sup.1 and R.sup.2 =H or C.sub.1 --C.sub.8 -hydrocarbon radicals; R.sup.3 =C.sub.1 --C.sub.8 -hydrocarbon radical ) by rearranging a 2-hydroxycyclohexanone dialkyl ketal II ##STR2## a) in the gas phase in the presence of a platinmetal or in the presence of a compound of one of these metals as catalyst in order to obtain a compound Ia, or