Efficient fast screening methodology for optical resolution agents: Solvent effects are used to affect the efficiency of the resolution process

An efficient and fast screening methodology for optical resolution agents through the classical crystallization of the corresponding diastereomeric salts is described. In this contribution, we demonstrate that the determination of the eutectic composition by chiral analysis of the corresponding mother liquor (ML) obtained under appropriate experimental conditions provides us with a very fast screening methodology. We also demonstrate that solvent can have a profound effect not only on the efficiency of the resolution process by modifying the eutectic composition but also on the ease of crystallization.