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:
Dec. 27, 2016
Filed:
Jan. 29, 2013
Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Xuhui District, Shanghai, CN;
Kuiling Ding, Shanghai, CN;
Xiaoming Wang, Shanghai, CN;
Zhaobin Han, Shanghai, CN;
Xubin Wang, Shanghai, CN;
Zheng Wang, Shanghai, CN;
Abstract
Disclosed are aromatic spiroketal diphosphine ligands, preparation methods and uses thereof. The ligands have the structure of formula (I), in which R, R, R, R, R, R, R, R, X and n are defined as such described in the specification. The aromatic spiroketal diphosphine ligands are prepared from aromatic spiroketal compounds. Also disclosed are the preparation methods of aromatic spiroketal compounds. The preparation methods are simple and can produce racemic or chiral aromatic spiroketal diphosphine ligands. The ligands can be used as catalysts of asymmetrical catalytic reactions having economical practicability and industry application prospect