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:
Jul. 15, 1997
Filed:
Jan. 16, 1996
Applicant:
Inventors:
Patricia Hussenet, Athis Mons, FR;
Philippe Le Goff, Strasbourg, FR;
Gerard Sennyey, Saint Aubin, FR;
Assignee:
Societe Nationale des Poudres et Explosifs, Paris Cedex, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564252 ;
Abstract
The invention relates to a new process for the synthesis of a disubstituted carbodiimide, including a first stage of phosgenation of an N,N'-disubstituted urea in an organic solvent medium. After this first stage ammonia is added to the reaction mixture without preliminary isolation of any intermediate compound. The process is simple, relatively inexpensive and the yield is high. Disubstituted carbodiimides are organic synthesis intermediates used especially in pharmaceutical chemistry as coupling agents in peptide synthesis.