Process for the preparation of pure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl) alanine
US5756812A · kind A · utility
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7Claims
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Key dates
| Filing date | Feb 5, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Feb 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of pure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl) alanine,in which impure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl)alanine is suspended in water, dissolved by heating to the boiling point and separated from insoluble impurities by filtration and the desired end product is then precipitated by cooling, filtered off and dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.