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:
Aug. 19, 2014
Filed:
Jun. 21, 2012
Applicants:
Qingguo Meng, Shandong, CN;
Mina Yang, Shandong, CN;
Tao Wang, Shandong, CN;
Qilin Wang, Shandong, CN;
Jun LI, Beijing, CN;
Zheng Ruan, Shandong, CN;
Inventors:
Qingguo Meng, Shandong, CN;
Mina Yang, Shandong, CN;
Tao Wang, Shandong, CN;
Qilin Wang, Shandong, CN;
Jun Li, Beijing, CN;
Zheng Ruan, Shandong, CN;
Assignee:
Shan Dong Luye Pharmaceutical Co., Ltd., Shandong, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 211/38 (2006.01); C07C 215/46 (2006.01); C07C 213/00 (2006.01); C07D 333/20 (2006.01); C07C 217/52 (2006.01); C07D 213/36 (2006.01); C07C 213/08 (2006.01);
U.S. Cl.
CPC ...
C07D 333/20 (2013.01); C07C 215/46 (2013.01); C07C 213/00 (2013.01); C07C 2102/10 (2013.01); C07C 217/52 (2013.01); C07D 213/36 (2013.01); C07C 213/08 (2013.01);
Abstract
A method for industrially preparing a nitrogen substituted 6-amino-5,6,7,8-tetrahydronaphthol includes reacting a nitrogen substituted amino-5,6,7,8-tetrahydronaphthol compound of formula (II) with a 2-substituted ethyl sulfonate compound of formula (III) under an alkaline condition and in the presence of a sulfite.