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. 08, 2014
Filed:
Jan. 20, 2009
Qilin Zhou, Tianjin, CN;
Shen LI, Tianjin, CN;
Shoufei Zhu, Trianjin, CN;
Canming Zhang, Tianjin, CN;
Lixin Wang, Tianjin, CN;
Qilin Zhou, Tianjin, CN;
Shen Li, Tianjin, CN;
Shoufei Zhu, Trianjin, CN;
Canming Zhang, Tianjin, CN;
Lixin Wang, Tianjin, CN;
Abstract
The present invention relates to a preparation method of carboxylic acids with optical activity, particularly, publishes that very useful chiral carboxylic acids can be obtained by the asymmetric catalytic hydrogenation of tri-substituted α,β-unsaturated carboxylic acids, with the complexes of the chiral phosphor nitrogen ligands and iridium used as the catalysts which show high activity and enantioselectivity (up to 99.8% ee), thus provides a more efficient method with higher enantioselectivity for asymmetric catalytic hydrogenation of chiral carboxylic acid-like compounds, and has important application value to asymmetric hydrogenation of chiral carboxylic acids.