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:
May. 31, 2022
Filed:
Dec. 22, 2020
Applicant:
Mannkind Corporation, Westlake Village, CA (US);
Inventors:
John J. Freeman, New Fairfield, CT (US);
Otto Phanstiel, Oviedo, FL (US);
William Elliot Bay, Ridgefield, CT (US);
Kelly Sullivan Kraft, Poughquag, NY (US);
Assignee:
MANNKIND CORP., Westlake Village, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 241/08 (2006.01); C07D 241/10 (2006.01); C07D 241/04 (2006.01);
U.S. Cl.
CPC ...
C07D 241/08 (2013.01); C07D 241/04 (2013.01); C07D 241/10 (2013.01);
Abstract
A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic α-N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent.