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:
Sep. 15, 1992
Filed:
Aug. 29, 1990
Applicant:
Inventors:
Birgit Blankemeyer-Menge, Braunschweig, DE;
Ronald Frank, Braunschweig, DE;
Assignee:
Gesellschaft fur Biotechnologische Forschung GmbH, Braunschweig, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08C / ; C08C / ;
U.S. Cl.
CPC ...
525 5411 ; 525434 ; 560155 ; 560265 ;
Abstract
The invention relates to a process for mild esterification of a sensitive carboxylic acid, in particular a suitably protected amino acid, with an alcohol component, the esterification according to the invention being carried out in the presence of 2,4,6-mesitylene-1-sulfonyl-3-nitro-1,2,4-triazolide (MSNT) and a weak base in an aprotic and non-basic solvent.