Tetra-benzyl voglibose in crystalline form and a method for...

Details Tetra-benzyl voglibose in crystalline form and a method for... Tetra-benzyl voglibose in crystalline form and a method for...

C - Chemistry, Metallurgy

07

C

C07C 215/44 (2006.01) C07C 213/10 (2006.01)

Patent

CA 2654424

The present invention provides crystalline tetrabenzyl voglibose with the following physical properties: there are peaks at 2.theta.=16.84±0.20°C, 18.99±0.20°and 24.11±0.20°of its Cu X-ray powder diffraction spectrum, and its melting point is 88.0°C~90.8°C. The present invention also provides a method for preparing the said crystal and a method of using the said crystal to prepare voglibose with high purity. Since the crystalline tetrabenzyl voglibose has higher purity and content than the oily tetrabenzyl voglibose, it can be stored and transported more easily, can be fetched and weighed more conveniently and when it is used to prepare voglibose, less impurity would be introduced or produced in the reaction.

Cette invention concerne un procédé permettant de préparer du voglibose tétrabenzyle cristallin présentant les propriétés physiques suivantes: pics à 2.theta.=16.84±0.20°C, 18.99±0.20°C et 24.11±0.20°C du spectre de diffraction de rayons X sur poudres de Cu, et un point de fusion compris entre 88°C et 90,8°C. Cette invention concerne également un procédépermettant de préparer ce cristal ainsi qu'un procédé permettant d'utiliser ledit cristal pour préparer du voglibose d'une grande pureté. Le voglibose tétrabenzyle cristallin présentant une pureté et un contenu plus importants que le voglibose tétrabenzyle aqueux, il peut être stocké et transporté plus facilement, il peut être extrait et pesé plus facilement et lorsqu'il est utilisé pour préparer le voglibose, il permet de réduire l'introduction ou la production d'impuretés dans la réaction.

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