Intermediates for the preparation of remifentanil hydrochloride
US10844014B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Oct 25, 2019 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Oct 25, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/98
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A new intermediate for synthesizing 1-substituted-4-[phenyl(propanoyl)amino]piperidine-4-carbonitrile derivatives is laid open. Specifically set out is a method for use of this intermediate in the preparation of remifentanil. The enclosed shorter process offers a greater yield of products with higher purity as compared to methods reported in the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.