Simple resolution of O,O'-dibenzoyltartaric acid by preferential crystallization of its calcium salt-methoxyethanol complex

Article abstract of DOI:10.1016/0957-4166(96)00294-7

The enantiomers of the title compound can be obtained in a simple two-step crystallization procedure starting from the racemate. The compound 2 of the calcium O,O'-dibenzoyl-tartrate formed with two molecules of 2-methoxyethanol exists as a conglomerate, making a simple enantioseparation possible.