Co-crystalline form of efinaconazole and method for preparing the same

Abstract

The present invention relates to a co-crystalline form of efinaconazole and a pharmaceutically acceptable coformer forming a co-crystalline phase. The present invention also relates to a method for preparing the co-crystalline form. The co-crystallization product of efinaconazole according to the present invention meets all requirements for use as an active ingredient of a pharmaceutical composition and is highly stable to heat and other one or more other ingredients of the composition. Therefore, the co-crystallization product of efinaconazole is suitable for use in the preparation of pharmaceuticals. In addition, the method of the present invention enables the preparation of the co-crystallization product of efinaconazole in a simple and easy manner on a commercial scale.

Dependencies are inferred from the claim text.