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:
Jan. 08, 2019
Filed:
Sep. 02, 2016
Applicant:
Colorado State University Research Foundation, Fort Collins, CO (US);
Inventors:
Eugene Y. Chen, Ft. Collins, CO (US);
Jian-Bo Zhu, Ft. Collins, CO (US);
Assignee:
Colorado State University Research Foundation, Ft. Collins, CO (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/82 (2006.01); C08G 63/08 (2006.01); C07D 405/04 (2006.01); C07D 515/08 (2006.01); C08L 67/04 (2006.01);
U.S. Cl.
CPC ...
C08G 63/823 (2013.01); C07D 405/04 (2013.01); C07D 515/08 (2013.01); C08G 63/08 (2013.01); C08L 67/04 (2013.01); C08L 2207/10 (2013.01);
Abstract
B/N Lewis pairs have been discovered to catalyze rapid epimerization of meso-lactide (LA) or LA diastereomers quantitatively into rac-LA. The obtained rac-LA can be kinetically polymerized into poly(-lactide) and optically resolved-LA, with a high stereoselectivity factor k/kof 53 and an ee value of 91% at 50.6% monomer conversion, by a bifunctional chiral catalyst. The epimerization and enantioselective polymerization can be coupled into a one-pot process for transforming meso-LA directly into poly(-lactide) and-LA.