| 摘要 |
PROBLEM TO BE SOLVED: To efficiently provide enantiomerically-pure azetidine-2-carboxylic acid. SOLUTION: The enantiomerically-pure azetidine-2-carboxylic acid is produced by (a) selective crystallization of a diastereomerically-pure azetidine-2-carboxylic acid-tartrate salt from a homogeneous solution of azetidine-2-carboxylic acid, optically-active tartaric acid, an organic acid and an aldehyde, and (b) liberation of the free amino acid. COPYRIGHT: (C)2009,JPO&INPIT
|
