3-Amino-2,3,3a,6,7,7a-hexahydro-thieno[3,2-b]pyridin-(4H)5-one
US3957794A · kind A · utility
8Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1975 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | May 2, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D495/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A novel procedure for the preparation of biotin, using cysteine as the starting material is disclosed. This process results in the obtention of pure d-biotin thus obviating the need for a chemical resolution. Novel intermediates are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.