Preparation process of carboxylic acid derivatives and intermediates thereof
US9533960B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Jun 28, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D239/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A cocrystal of (S)-2-hydroxy-3-methoxy-3,3-diphenylpropanoic acid and an amino acid, in particular L-valine or L-2-aminobutyric acid, their preparation processes, as well as the preparation process of Ambrisentan or Darusentan using any of the cocrystals of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.