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:
Nov. 28, 1989
Filed:
Jul. 12, 1988
Applicant:
Inventors:
Reinhold Keller, Bad Soden am Taunus, DE;
Merten Schlingmann, Konigstein/Taunus, DE;
Martin Platen, Frankfurt am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 41 ;
Abstract
Dipeptide alkyl esters whose alkyl group contains 3 to 7 carbon atoms can be converted to the corresponding methyl ester compound by a rapid, gentle transesterification in anhydrous methanol in the presence of an alkali metal alcoholate, without racemization occuring on the two chiral carbon atoms.