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:
Jul. 14, 2026
Filed:
Mar. 30, 2023
Chengda Pharmaceuticals Co., Ltd., Jiaxing, CN;
Yu Feng, Jiaxing, CN;
Wei Qian, Jiaxing, CN;
Yanping Xu, Jiaxing, CN;
Liyan Gao, Jiaxing, CN;
Weihui Zhong, Jiaxing, CN;
Fei Ling, Jiaxing, CN;
Tao Liu, Jiaxing, CN;
Abstract
The present disclosure discloses a method for the preparation of sulfinpyrazone, which is produced in two steps with a total yield of 48%, wherein thiophenol as the starting material is electrocatalytically coupled with dichloroethane to obtain 2-chloroethyl phenyl sulfoxide, which then undergoes a substitution reaction with 1,2-diphenyl-3,5-pyrazolidinedione to produce sulfinpyrazone. Compared with the prior art, the present method is characterized by high yield, short steps, less three wastes, good chemical selectivity, no need to use strong bases and oxidants, safe and simple operation, and easy to realize industrial production.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile