Polar silanes and their use on silica supports

Details Polar silanes and their use on silica supports Polar silanes and their use on silica supports

B - Operations, Transporting

01

D

B01D 15/08 (2006.01) B01J 20/291 (2006.01) B01J 20/32 (2006.01) B01D 15/32 (2006.01) B01D 15/36 (2006.01) B01D 15/38 (2006.01)

Patent

CA 2477782

A modified silica support having a polar phase bound to its surface and suitable for use for chromatographic separations, having the following formula: (I); wherein, m = 0 - 20; n = 0 - 20; p =1 - 50; X is sulfonyl, carbonyl, carbamoyl, or oxycarbonyl; R1 = H, alkyl, substituted alkyl, aryl or substituted aryl groups; R2 = alkyl, substituted alkyl, aryl or substituted aryl groups; and R3 and R4 are alkyl, aryl, hydroxyl, or alkoxyl groups or groups including oxygen atoms cross-linked to silicon atoms. Also, a polar silane intermediate to make this support.

L'invention concerne un support de silice modifié ayant une face polaire liée à sa surface et se prêtant à une utilisation dans des séparations chromatographiques dont la formule est la suivante : (I) gel de silice, dans laquelle, m = 0 - 20; n = 0 - 20; p =1 - 50; X désigne sulfonyle, carbonyle, carbamoyle, ou oxycarbonyle; R¿1? = H, alkyle, alkyle substitué, aryle ou groupes aryle substitués; R¿2? = alkyle, alkyle substitué, aryle ou groupes aryle substitués; et R¿3? et R¿4? désignent alkyle, aryle, hydroxyle, ou groupes alcoxyle ou groupes contenant des atomes d'oxygène réticulés avec des atomes de silicium. Fait également l'objet de cette invention un intermédiaire de silane polaire permettant de réaliser ce support.

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