Process for the preparation of 2-bromo-.alpha.-ergocryptine
US4697017A · kind A · utility
2Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1986 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a novel process for the preparation of 2-bromo-.alpha.-ergocryptine and its acid addition salt by brominating .alpha.-ergocryptine in such a way that the bromination is carried out at room temperature by using a dimethylsulphoxide-hydrogen bromide mixture containing no more 0.02% of water and, if desired, converting the thus-obtained 2-bromo-.alpha.-ergocryptine to an acid addition salt in a known manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.