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. 07, 2018
Filed:
Mar. 31, 2016
Applicant:
Seasons Biotechnology (Taizhou) Co., Ltd., Taizhou, CN;
Inventors:
Assignee:
SEASONS BIOTECHNOLOGY (TAIZHOU) CO., LTD., Taizhou, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 241/20 (2006.01);
U.S. Cl.
CPC ...
C07D 241/20 (2013.01);
Abstract
The present invention relates to preparation methods of a prostacyclin receptor agonist of 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide and its intermediates. These methods are simple and convenient to operate, environment-friendly and suitable for industrial production to obtain the product with good yield and high purity.