Selective solvent extraction for the purification of protected nucleosides
US6414137B1 · kind B1 · utility
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32Claims
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Key dates
| Filing date | Nov 15, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07H19/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of nucleosides, and more particularly to a selective solvent extraction method for purifying protected nucleosides. In the purification process, solid particles of protected nucleosides are selectively washed to remove undesirable polar and/or non-polar impurities, while leaving the solid particles substantially undissolved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.