Preparation of sufentanil citrate and sufentanil base
US12371423B2 · kind B2 · utility
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10References
21Claims
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Key dates
| Filing date | Nov 8, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Nov 8, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/412
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided herein are processes for forming sufentanil citrate from sufentanil base. One process comprises forming sufentanil citrate in the presence of a polar non-aqueous solvent. Other processes comprise forming sufentanil citrate in the presence of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.