Polar silanes and their use on silica supports
US6949186B2 · kind B2 · utility
5Cited by
12References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 12, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Mar 9, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A modified silica support having a polar phase bound to its surface and suitable for use for chromatographic separations, having the following formula: 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.