Preparation of d-2-amino-1-butanol salts
USRE29588E · kind E · reissue
7Cited by
2References
9Claims
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Key dates
| Filing date | Dec 2, 1971 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Dec 2, 1991 |
Classification
- Technology area (CPC —)General
Abstract
A racemic mixture of dl-2-amino-1-butanol is resolved with separation of the d-2-amino-1-butanol by crystallizing as a salt with L(+)-tartaric acid from an essentially anhydrous solution in ethanol or methanol. The salt is decomposed with calcium hydroxide to yield the d-2-amino-1-butanol. Water may be added to the residual anhydrous solution to separate the l-2-amino-1-butanol. Other listed volatile solvents may be present in the anhydrous ethanol or methanol without inhibiting the sharp separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.