Process for preparing biotin
US4537973A · kind A · utility
6Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1981 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Oct 8, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D495/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing biotin, characterized in that a compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each hydrogen or benzyl and R.sup.3 is hydrogen or carboxyl, with the proviso that R.sup.1 and R.sup.2 are not simultaneously hydrogen, or a mixture of two or more different compounds of the formula [I] is heated in the presence of an alkanesulfonic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.