C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/279.6
C07D 213/82 (2006.01)
Patent
CA 2006665
A novel process for purifying crude 1, 2-bis(nicotinamido)propane obtained by the reaction of nicotinic acid with 1,2-propanediamine. This process comprises forming 1,2-bis(nicotinamido)propane dinitrate from the crude 1,2-bis(nicotinamido)propane, suspending the dinitrate in an organic solvent, adding an alkali or an alkaline solution to the suspension to dissociate the free 1,2-bis(nicotinamido)propane, extracting it from the suspension with a solvent, and removing the solvent to isolate the purified product. According to this process, crude 1, 2-bis(nicotinamido)propane can be efficiently purified to give the product having a high purity.
Nouveau procédé pour purifier du 1, 2-bis(nicotinamido)propane brut, obtenu par réaction de l'acide nicotinique avec la 1,2-propanediamine. Ce procédé consiste à préparer le dinitrate de 1,2-bis(nicotinamido)propane à partir du 1,2-bis(nicotinamido)propane, à mettre en suspension le dinitrate dans un solvant organique, à ajouter un alcali ou une solution alcaline à la suspension pour dissocier le 1,2-bis(nicotinamido)propane, à l'extraire de la suspension à l'aide d'un solvant, et à éliminer le solvant pour isoler le produit purifié. Grâce à ce procédé, on peut purifier efficacement le 1, 2-bis(nicotinamido)propane brut pour obtenir un produit de grande pureté.
Chugai Seiyaku Kabushiki Kaisha
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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