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. 17, 2001
Filed:
Apr. 30, 1999
Nicola De Santis, Milan, IT;
Salvatore Incandela, Milan, IT;
Dibra S.p.A., Milan, IT;
Abstract
A process for the preparation of S-N,N′-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-5-[(2-hydroxy-1-oxopropyl)amino]-2,4,6-triiodo-1,3-benzenedicarboxamide, comprising the formation of S-N,N′-bis[2-hydro-xy-1-(hydroxymethyl)ethyl]-5-[(2-(acetyloxy)-1-oxopro-pyl)amino]-2,4,6-triiodo-1,3-benzenedicarboxamide star-ting from S-(−)-5-[[2-(acetyloxy)-1-oxopropyl]amino]-2,4,6-triiodo-1,3-benzenedicarboxylic acid dichloride and 2-amino-1,3-propanediol in a solvent, characterized in that the solvent is selected from the group consisting of: lower alcohols, monoalkyl ether glycols and straight or branched cyclic alkyl ethers.