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. 10, 2026
Filed:
Jun. 21, 2021
Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Lianyungang, CN;
Guofeng Liu, Lianyungang, CN;
Yong Wang, Lianyungang, CN;
Meng Guo, Lianyungang, CN;
Xiquan Zhang, Lianyungang, CN;
Kaizhen Song, Lianyungang, CN;
Jinhu Liu, Lianyungang, CN;
Junshan Luo, Lianyungang, CN;
CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD, Lianyungang, CN;
Abstract
A preparation method for a CDK4/6 inhibitor for a compound of formula (I):5-fluoro-4-(3-isopropyl-2-methyl-2H-indazol-5-yl)-N-(5-(piperazin-1-yl) pyrazol-2-yl)pyrimidine-2-amine. The preparation method has cheap and readily available starting materials and reagents, greatly simplified total reaction steps, shortened reaction time, improved total yield and a high purity of the key intermediate and final product, being suitable for industrial production.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile