Enantiomeric separation of optically active pyridazinone derivatives by chiral HPLC.

Several 4,5-disubstituted 3(2H)-pyridazinone derivatives containing 2-hydroxymethylpyrrolidino moiety as a chiral building block were synthetized. Separation of enantiomers was carried out by chiral HPLC on Chiralcel OJ and OF columns. Mobile phases consisted of hexane, ethanol and 2-propanol. Chiralcel OJ column was capable of separating most of the enantiomeric pairs. For one type of compound. Chiralcel OF column was used for separation.