[EN] PROCESS FOR THE DIASTEREOISOMERIC RESOLUTION OF 5-METHYLTETRAHYDROFOLIC ACID<br/>[FR] PROCÉDÉ DE RÉSOLUTION DIASTÉRÉOISOMÉRIQUE D'ACIDE 5-MÉTHYLTÉTRAHYDROFOLIQUE
申请人:GNOSIS SPA
公开号:WO2009103333A1
公开(公告)日:2009-08-27
The invention relates to a process for the diastereoisomeric resolution of 5-methyltetrahydrofolic acid; it discloses also a crystalline amine salt of 5-methyltetrahydrofolic acid and is further directed to a process for the transformation of the single diastereoisomers of the 5-methyltetrahydrofolic amine salts obtained by the process of the invention into the corresponding free acid or into an alkaline earth metal salt. The invention provides a simple, economically advantageous and efficient process and allows to obtain stable and pure (6R) and ( 6S) -diastereoisomers of 5-methyltetrahydrofolic acid in a good yield and diastereoisomeric purity.
[EN] RESOLUTION OF TETRAHYDROFOLIC ACID DERIVATIVES<br/>[FR] SÉPARATION DE DÉRIVÉS D'ACIDE TÉTRAHYDROFOLIQUE
申请人:WATSON LAB INC
公开号:WO2013025203A1
公开(公告)日:2013-02-21
A process of preparing (6S)-tetrahydrofolic acid derivatives comprising reacting racemic (6RS)-tetrahydrofolic acid derivatives with N-alkyl-D-glucamine, forming N-alkyl-D-glucamine salts of the (6RS)-tetrahydrofolic acid derivatives, isolation of the N-alkyl-D-glucamine salt of the (6S)-tetrahydrofolic acid derivative, removal of the N-alkyl-D-glucamine cation and purification of the (6S)-tetrahydrofolic acid derivative. The purified (6S)-tetrahydrofolic acid derivative can then be converted into the corresponding alkali metal or alkaline earth metal salts.