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:
Nov. 17, 2015
Filed:
Dec. 01, 2011
Xianhua Pan, Taizhou, CN;
Weijin LI, Taizhou, CN;
Qunhui Zhang, Taizhou, CN;
Libo Ruan, Taizhou, CN;
Wansheng Yu, Taizhou, CN;
Fei Deng, Taizhou, CN;
Tianhua MA, Taizhou, CN;
Mingwang Huang, Taizhou, CN;
Minhuan He, Taizhou, CN;
Xianhua Pan, Taizhou, CN;
Weijin Li, Taizhou, CN;
Qunhui Zhang, Taizhou, CN;
Libo Ruan, Taizhou, CN;
Wansheng Yu, Taizhou, CN;
Fei Deng, Taizhou, CN;
Tianhua Ma, Taizhou, CN;
Mingwang Huang, Taizhou, CN;
Minhuan He, Taizhou, CN;
ZHEJIANG HISOAR PHARMACEUTICAL CO., LTD., Taizhou, CN;
Abstract
Disclosed are intermediates of Sitagliptin, a preparation process thereof, and a process for synthesizing Sitagliptin using these intermediates. Sitagliptin is synthesized by using chiral amino compounds as a raw material, without having to build a chiral center with a chiral asymmetric catalytic hydrogenation, and high-pressure hydrogenation is avoided.