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:
Apr. 19, 2016
Filed:
Apr. 17, 2013
Kyorin Pharmaceutical Co., Ltd., Tokyo, JP;
Takeshi Tsubuki, Tochigi, JP;
Hiroya Sato, Tochigi, JP;
KYORIN PHARMACEUTICAL CO., LTD., Tokyo, JP;
Abstract
[Problem] For example, 4-(3-benzyloxyphenylthio)-2-chloro-1-(3-nitropropyl)benzene (compound 1) is used as an intermediate for producing a 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride which has excellent immunosuppressive activity. This compound 1 is traditionally obtained only as an oil and thus handling and refining were difficult. [Solution] A crystal of the compound 1 is obtained. A method of crystallizing the same is also established. Furthermore, a simple refining method is also found which comprises stirring in suspension the crystal in a solvent. Since the compound 1 can be obtained as a crystal, it is easier to handle and long term storage is possible.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile