Process for the preparation of sucrose-6-ester by...

Details Process for the preparation of sucrose-6-ester by... Process for the preparation of sucrose-6-ester by...

C - Chemistry, Metallurgy

07

H

C07H 13/02 (2006.01) C07H 1/00 (2006.01) C07H 5/02 (2006.01)

Patent

CA 2667366

One embodiment of the present inventionis a process of making sucrose-6-ester from sucrose by transesterification in the presence of a solid super acid catalyst such as SO4 2---TiO2/Al2O3 or SO4 2---TiO2. The sucrose-6-acetate is then chlorinated to afford sucralose-6-acetate, using BTC or thionyl chloride. Sucralose-6-acetate is converted into TPSGA for the purpose of purification. TPSGA is de-esterified by sodium methoxide/methanol or sodium ethoxide/ethanol to give sucralose.

Cette invention concerne un procédé permettant de préparer du sucrose-6-ester à partir de sucrose par transestérification en présence d'un catalyseur superacide solide tel que SO4 2---TiO2/Al2O3 ou SO4 2---TiO2. Le sucrose-6-acétate est ensuite chloré de manière à obtenir du sucralose-6-acétate au moyen de BTC ou de chlorure de thionyle. Le sucralose-6-acétate est transformé en TPSGA afin d'être purifié. Le TPSGA est désestérification au moyen d'un mélange méthoxyde de sodium/méthanol ou éthoxyde de sodium/éthanol afin d'obtenir du sucralose.

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