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:
Mar. 16, 1993
Filed:
Dec. 20, 1991
Applicant:
Inventors:
Eberhard Kuehn, Hemhofen, DE;
Juergen Beck, Erlangen, DE;
Hellmut Ahne, Roettenbach, DE;
Siegfried Birkle, Hoechstadt A/Aisch, DE;
Rainer Leuschner, Erlangen, DE;
Michael Sebald, Hessdorf-Hannberg, DE;
Recai Sezi, Roettenbach, DE;
Hans-Juergen Bestmann, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Munchen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548531 ;
Abstract
To produce N-tertiary butoxycarbonyl-maleinimide, maleinimide is reacted in the presence of a heterocyclic nitrogen compound having at least one tertiary nitrogen atom (as a base) with a more or less equimolar quantity of di-tertiary butyl-dicarbonate in a suitable solvent at temperatures of up to about 80.degree. C.