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:
Dec. 11, 2001
Filed:
Oct. 20, 2000
Applicant:
Inventors:
Horst Weigel, Rodenbach, DE;
Steffen Krill, Speyer, DE;
Hans Joachim Hasselbach, Gelnhausen, DE;
Klaus Huthmacher, Gelnhausen, DE;
Assignee:
Degussa Dental GmbH & Co. KG, Hanua, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07C 6/748 ; C07C 4/984 ; C07C 3/606 ;
U.S. Cl.
CPC ...
C07D / ; C07C 6/748 ; C07C 4/984 ; C07C 3/606 ;
Abstract
A process for preparing esterified chroman compounds from 2,6,6-trimethylcylohex-2-ene-1,4-dione, wherein the esterified intermediates are reacted directly to give the desired chroman derivatives without an additional purification step.