Process for the preparation of a novel umeclidinium synthesis intermediate
US11028082B2 · kind B2 · utility
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14Claims
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Assignee
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Key dates
| Filing date | May 28, 2018 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | May 28, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D453/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of a novel and versatile synthesis intermediate and its use in the preparation of umeclidinium. The invention also relates to some reference standards allowing to detect impurity traces recurring in the preparation of umeclidinium and a process for their preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.