Process for preparation of enantiomerically pure...

Details Process for preparation of enantiomerically pure... Process for preparation of enantiomerically pure...

C - Chemistry, Metallurgy

07

D

C07D 211/90 (2006.01) C07D 401/04 (2006.01) C07D 401/12 (2006.01) C07D 405/04 (2006.01) C07D 405/12 (2006.01) C07D 409/04 (2006.01) C07D 413/04 (2006.01) C07F 9/59 (2006.01)

Patent

CA 2047741

2047741 9009376 PCTABS00001 A process for the optical resolution of racemic 1,4-dihydropyridines, containing isothioureido groups. Salification of racemic isothioureas with optically active acids produces diasteroisomeric mixtures of isothiouronium salts, that, using conventional techniques, are separated in the individual components to give optically pure isothioureides of 1,4-dihydropyridines and salts thereof with conventional acids. Said optically pure 1,4-dihydropyridines can then be subjected to desulphuration and to different transformations to give other enantiomerically pure and therapeutically useful 1,4-dihydropyridines.

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