Crystalline forms of a biphenyl compound
The invention provides crystalline forms of biphenyl-2-ylcarbamic acid 1-(2-{[4-(4-carbamoylpiperidin-1-ylmethyl)benzoyl]methylamino}ethyl)piperidin-4-yl ester, and pharmaceutically acceptable solvates thereof. The crystalline form can be a freebase, or a salt such as a diphosphate, monosulfate or dioxalate salt. The invention also provides pharmaceutical compositions comprising these crystalline compounds or prepared using these compounds; processes and intermediates for preparing the crystalline compounds; and methods of using these compounds to treat a pulmonary disorder.
1. A method for treating chronic obstructive pulmonary disease or asthma in a patient, the method comprising administering to the patient a crystalline salt of biphenyl-2-ylcarbamic acid 1-(2-{[4-(4-carbamoylpiperidin-1-ylmethyl)benzoyl]-methylamino}ethyl)piperidin-4-yl ester and phosphoric acid in a molar ratio of from about 1:1.8 to about 1:2.2; wherein the crystalline salt is characterized by:
(a) a powder x-ray diffraction pattern having two or more diffraction peaks at 2θ values selected from 6.4±0.2, 7.6±0.2, 8.6±0.2, 13.7±0.2, 15.0±0.2, 19.4±0.2, 21.6±0.2, 22.1±0.2, 22.9±0.2, and 23.7±0.2; or
(b) a differential scanning calorimetry trace which shows a maximum endothermic heat flow at about 154.5° C.
2. The method of claim 1 , wherein the molar ratio is from about 1:1.9 to about 1:2.1.
3. The method of claim 1 , wherein the patient is treated for chronic obstructive pulmonary disease.
4. The method of claim 1 , wherein the patient is treated for asthma.
5. The method of claim 1 , wherein the crystalline salt is characterized by a powder x-ray diffraction pattern having two or more diffraction peaks at 2θ values selected from 6.4±0.2, 7.6±0.2, 8.6±0.2, 13.7±0.2, 15.0±0.2, 19.4±0.2, 21.6±0.2, 22.1±0.2, 22.9±0.2, and 23.7±0.2.
6. The method of claim 5 , wherein the powder x-ray diffraction pattern comprises diffraction peaks at 2θ values of 15.0±0.2, 19.4±0.2, 21.6±0.2, and 23.7±0.2.
7. The method of claim 1 , wherein the crystalline salt is characterized by a differential scanning calorimetry trace which shows a maximum endothermic heat flow at about 154.5° C.