Reaktion #164025
ord-c4857fc2c7fa4557abce9b560a7bf2c7
Reaktionsgleichung
Reagenzien
Reaktionsbedingungen
Aufarbeitung
- 1Sonstigeresulted in complete racemization
- 2SonstigeThe solvent is removed at 55° C. (±5) under reduced pressure
Vorschrift
A process was developed to racemize D-tert-leucine so that it can be recycled. Use of acids, although caused racemization, resulted in salt formation. It was tedious to obtain free amino acid from such salts. The same drawback was observed when a strong base such as sodium hydroxide was used. However, treating D-tert-leucine with ammonium hydroxide resulted in complete racemization. The reaction has to be conducted at about 80° C. for about 12 hours in an autoclave to prevent the escape of ammonia. The solvent is removed at 55° C. (±5) under reduced pressure to obtain DL-tert-leucine. After the reaction, although ammonium salt of DL-tent-leucine is obtained, during the removal of the solvent, ammonia also is eliminated and free amino acid is obtained.