PROCESS FOR THE RESOLUTION OF HOMOCYSTEINE-γ-THIOLACTONE

摘要

The present invention relates to a process for the preparation of enantiomerically pure homocysteine-γ-thiolactone comprising optical res- olution of racemic homocysteine-γ-thiolactone (I) with a chiral organic acid wherein one isomer is recovered as diastereomeric salt with the organic acid and the other isomer remaining in the mother liquor is submitted to racemisa- tion with a catalytic amount of an aromatic aldehyde and submitted again to optical resolution with the same chiral organic acid.