C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 231/02 (2006.01) C07C 237/46 (2006.01)
Patent
CA 2331660
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- hydroxy- 1(hydroxymethyl)ethyl]- 5-[(2- (acetyloxy)--1-oxopropyl)amino]- 2,4,6- triiodo-1,3- benzenedicarboxamide starting 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.
Procédé servant à préparer S- N,N'- bis[2- hydro-xy-1- (hydroxyméthyl) éthyl]- 5-[(2- hydroxy-1- oxopropyl)-amino]- 2,4,6- triiodo- 1,3- benzènecarboxamide et consistant à préparer S- N,N'- bis[2 -hydro-xy- 1-(hydroxyméthyl)éthyl]- 5-[(2- acétyloxy-1- oxopro-pyl)amino]- 2,4,6- triiodo-1,3- benzènedicarboxamide à partir de dichlorure d'acide S-(-)- 5-[[2- (acétyloxy)- 1-oxopropyl]amino]- 2,4,6- triiodo- 1,3- benzènedicarboxylique et 2- amino- 1,3- propanediol dans un solvant, caractérisé par le fait que ce solvant est sélectionné dans le groupe constitué par des alcools inférieurs, des monoalkylétherglycols et des alkyléthers cycliques linéaires ou ramifiés.
Desantis Nicola
Incandela Salvatore
Dibra S.p.a.
Kirby Eades Gale Baker
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