Sucralose pentaester production

C - Chemistry – Metallurgy – 07 – H

Patent

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Details

C07H 13/08 (2006.01)

Patent

CA 2205535

In copending SN 2,114,180, a process for producing substantially pure sucralose pentaester from a mixture of 6-O- acyl-4,1',6'-trichloro-4,1',6'-trideoxyqalactosucrose in a reaction medium comprising a tertiary amide is described wherein said process comprises the steps of: (a) recovering the 6-O-acyl-4,1',6'-trichloro-4,1', 6'- trideoxygalactosucrose from said mixture; (b) peracylating the 6-O-acyl-4,1',6'-trichloro- 4,1',6'trideoxygalactosucrose product of step (a) to produce thereby 4, 1',6'-trichloro-4,1',6'-trideoxygalactosucrose pentaester; and (c) crystallizing the 4,1',6'-trichloro-4,1',6'- trideoxygalactosucrose pentaester product of step (b) to produce substantially pure 4,1',6'-trichloro-4,1',6'- trideoxygalactosucrose pentaester. This application is for a specific sucralose pentaester product that can be obtained from the above process, namely 6-O- benzoyl-4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose tetraacetate.

Dans la codemande en cours SN 2,114,180, on décrit une méthode pour préparer un pentaester de sucralose à partir d'un mélange de 6-O- acyl-4,1',6'-trichloro-4,1',6'-tridésoxygalactosucrose dans un milieu de réaction renfermant un amide tertiaire, avec les étapes suivantes : a) récupération du 6-O- acyl-4,1',6'-trichloro-4,1',6'-tridésoxygalactosucrose à partir dudit mélange; b) peracylation du 6-O- acyl-4,1',6'-trichloro-4,1',6'-tridésoxygalactosucrose de l'étape a) pour l'obtention de pentaester de 4, 1',6'-trichloro-4,1',6'-tridésoxygalactosucrose; c) cristallisation du pentaester de 4, 1',6'-trichloro-4,1',6'-tridésoxygalactosucrose de l'étape b) pour l'obtention de pentaester de 4, 1',6'-trichloro-4,1',6'-tridésoxygalactosucrose pratiquement pur. Cette demande concerne un pentaester de sucralose spécifique, à savoir le tétraacétate de 6-O- acyl-4,1',6'-trichloro-4,1',6'-tridésoxygalactosucrose, qui peut être préparé grâce à la méthode ci-dessus.

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