Crystalline diastereomeric L-alpha-methyldopa POE ester and process for its preparation
US4440942A · kind A · utility
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16Claims
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Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a crystalline form of diastereomeric L-.alpha.-methyldopa POE ester, also referred to as (R),(S)-.alpha.-pivaloyloxyethyl-(S)-3-(3,4-dihydroxyphenyl)-2-methylalani nate and a process for its isolation. Also disclosed is an improved process for the formation of diastereomeric L-.alpha.-methyldopa POE ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.