Process for the preparation of (4-hydroxy-6-oxo-tetrahydropyran-2-yl) acetonitrile and derivatives
US7423162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Sep 29, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P3/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile from 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one, wherein X stands for a leaving group, by reacting 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one with a cyanide ion in water and by subsequent lowering of the pH to a pH between 0 and 5. (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable from (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile may suitably be used in the preparation of a pharmaceutical preparation, more in particular in the preparation of statins, more in particular in the preparation of Atorvastatine or a salt thereof, for instance its calcium salt. The invention also relates to (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.