Crystalline forms of cefdinir potassium salt
OwnerVinod Kansal, Dhirenkumar Mistry +4inventors
InventorsVinod Kansal, Dhirenkumar Mistry, Saurabh Pandey, Rakesh Patel, Shlomit Wizel, Jean Hildesheim
Life of this patent
Estimating the term…
Abstract
The present invention encompasses the solid state chemistry of cefdinir potassium salt.
Claims78
A crystalline form of cefdinir potassium salt (Form E) characterized by X-ray powder diffraction peaks at about 11.5, 12.3, 23.9, 24.6 and 27.0±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form I) characterized by X-ray powder diffraction peaks at about 8.5, 11.5, 16.7, and 18.4±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form J) characterized by X-ray powder diffraction peaks at about 8.3, 11.2, 11.5, 18.4, and 26.3±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form K) characterized by X-ray powder diffraction peaks at about 8.2, 11.1, 22.4, 23.7, 24.2, and 26.3±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form L) characterized by X-ray powder diffraction peaks at about 12.9, 16.6, 19.8, 22.0, and 23.6±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form S) characterized by X-ray powder diffraction peaks at about 6.0, 9.7, 14.3, 15.3, 23.2, and 25.9±0.2 degrees two-theta.
A crystalline form of cefdinir potassium salt (Form T) characterized by X-ray powder diffraction peaks at 6.0, 9.8, 14.4, and 21.1±0.2 degrees two-theta.
A process for preparing cefdinir comprising converting cefdinir potassium to cefdinir.
Dependencies are inferred from the claim text.