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:
Jul. 26, 2016
Filed:
Mar. 11, 2014
Applicants:
Lidong Xing, Shanghai, CN;
Weitong Dong, Shanghai, CN;
Jun LU, Shanghai, CN;
Ulrich Scholz, Bad Kreuznach, DE;
Jun Yan, Shanghai, CN;
Jinsong Yang, Ingelheim am Rhein, DE;
Inventors:
Lidong Xing, Shanghai, CN;
Weitong Dong, Shanghai, CN;
Jun Lu, Shanghai, CN;
Ulrich Scholz, Bad Kreuznach, DE;
Jun Yan, Shanghai, CN;
Jinsong Yang, Ingelheim am Rhein, DE;
Assignee:
BOEHRINGER INGELHEIM INTERNATIONAL GMBH, Ingelheim am Rhein, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 307/32 (2006.01); C07D 307/20 (2006.01); C07D 315/00 (2006.01);
U.S. Cl.
CPC ...
C07D 307/32 (2013.01); C07D 307/20 (2013.01);
Abstract
This invention relates to a novel method for the preparation of 3-oxo-tetrahydrofuran comprising oxidizing 3-hydroxy-tetrahydrofuran in the presence of a catalytic amount of 2,2,6,6-tetramethyl-piperidine-N-oxyl (TEMPO) with trichloroisocyanuric acid.