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:
Mar. 22, 2022
Filed:
Jun. 18, 2021
Applicant:
Xwpharma Ltd., Grand Cayman, KY;
Inventors:
Jia-Ning Xiang, Fremont, CA (US);
Hao-Wei Shih, New Taipei, TW;
Xiaoming Wu, Wuhan, CN;
Xuan Zhang, Wuhan, CN;
James Tien, Taoyuan, TW;
Assignee:
XWPHARMA LTD., Grand Cayman, KY;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 229/08 (2006.01); C07C 227/20 (2006.01); C07C 227/18 (2006.01); C07C 271/22 (2006.01); C07C 269/06 (2006.01);
U.S. Cl.
CPC ...
C07C 229/08 (2013.01); C07C 227/18 (2013.01); C07C 227/20 (2013.01); C07C 269/06 (2013.01); C07C 271/22 (2013.01);
Abstract
The present disclosure is directed synthetic methods for the preparation of 4-valyloxybutyric acid. The synthetic methods described herein employ a diverse array of protecting group strategies and reaction conditions. Additionally, the present disclosure is directed to compounds useful as synthetic intermediates in the preparation of 4-valyloxybutyric acid.