| 摘要 |
<p>The problem to be solved by the present invention is to ea sily and efficiently produce an amino acid having 2 to 7 carbon atoms as a high-purity solid without complicated operation, whic h is useful as a synthetic intermediate for medicines or agroche micals. The present invention is characterized in comprising a ste p of precipitating solid amino acid with high purity. In the pr esent invention, the by-produced salt composed of the sulfonic a cid and the amine was removed to the mother liquor by reacting a n amine with a sulfonic acid salt of amino acid in an aprotic pol ar solvent, or by reacting a sulfonic acid with an amine salt of amino acid in an aprotic polar solvent. The sulfonic acid salt of amino acid, for example, may be produced by reacting a N-(tert-butoxycarbonyl) amino acid with a sulfonic acid, or by reacting an amino acid tert-butyl ester we th a sulfonic acid.</p> |
