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:
Jun. 09, 2009
Filed:
Aug. 30, 2007
William Elliott Bay, Ridgefield, CT (US);
Joseph Norman Bernadino, Stamford, CT (US);
George Frederick Klein, Tarrytown, NY (US);
Yi Ren, Warren, NJ (US);
Pingsheng Zhang, Florence, SC (US);
William Elliott Bay, Ridgefield, CT (US);
Joseph Norman Bernadino, Stamford, CT (US);
George Frederick Klein, Tarrytown, NY (US);
Yi Ren, Warren, NJ (US);
Pingsheng Zhang, Florence, SC (US);
Hoffmann-La Roche Inc., Nutley, NJ (US);
Emisphere Technologies, Inc., Tarrytown, NY (US);
Abstract
Disclosed are improved methods for the synthesis of N-(8-[2-hydroxybenzoyl]-amino)caprylic acid. Certain compounds have been found useful for preventing the formation of a colored impurity when included in an ester hydrolysis reaction. Conducting ester hydrolysis in anaerobic conditions has also been found to minimize the formation of the color impurity. Also disclosed are improved methods for synthesizing the sodium salt of N-(8-[2-hydroxybenzoyl]-amino)caprylic acid.