Other

Utopharm Co., Ltd.

Luo, Junzhi

Siyuan Gao

Junzhi Luo

Jing Nian

A stable Crystalline Form II of non-solvate of Apremilast (Formula I), methods of making Form II, pharmaceutical compositions comprising Form II, and their uses are disclosed. Also discloses are mixed crystals comprising Form Hand Form B and methods of making the same. The crystalline forms are characterized using X-ray powder diffractometry (XRPD), infrared spectroscopy (IR), differential scanning calorimetry (DSC), and thermal gravimetric analysis (TG). As compared with Forms A, B, C, D, E, F, and G reported in prior art references, Apremilast Form II of the present invention is more stable to temperature, light, and humidity, and is more suitable for long term storage; the crystallization solvents are safe and can be easily removed; the Form II has a white or off white appearance, and can be directly used in preparation processing; the preparation methods are simple and easy to reproduce, and are suitable for industrialized production. 

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Shanghai, China

Siyuan Gao