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:
Nov. 28, 2023
Filed:
Jan. 18, 2019
Applicant:
Yuki Gosei Kogyo Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
YUKI GOSEI KOGYO CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 211/70 (2006.01); C07D 211/34 (2006.01); C07D 211/46 (2006.01);
U.S. Cl.
CPC ...
C07D 211/70 (2013.01); C07D 211/34 (2013.01); C07D 211/46 (2013.01);
Abstract
The object of the present invention is to provide 1-(1-tert-butoxycarbonyl-4-piperidylacetyl)-4-mesyloxypiperidine having a low content of impurities The object can be solved by a method for preparing 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine, comprising the steps of: to obtain 1-benzyl-4-piperidyl acetic acid ethyl ester represented by the formula [2]: in the presence of base, to obtain 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine represented by the formula [4]: