Crystalline forms of a pyridinyl-sulfonamide and their use...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C544S319000

Reexamination Certificate

active

11596260

ABSTRACT:
Crystalline forms A and B of 5-methyl-pyridine-2-sulfonic acid [6-methoxy-5-(2-methoxy-phenoxy)-2-pyridin-4-yl-pyrimidin-4-yl]-amide of formula (I) are described, whereby form B is the most stable form. 5-methyl-pyridine-2-sulfonic acid [6-methoxy-5-(2-methoxy-phenoxy)-2-pyridin-4-yl-pyrimidin-4-yl]-amide also forms solvates with, for example, ethanol, acetone, tetrahydrofuran, methanol, isopropanol, 2-butanone and dichloromethane.

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Mino R. Caira, “Crystalline Polymorphism of Organic Compounds”, Topics in Current Chemistry, vol. 198, pp. 163-208, XP001156954, 1998.
Sophie-Dorothée Clas, “The importance of characterizing the crystal form of the drug substance during drug development”, Current Opinion in Drug Discovery and Development, vol. 6, No. 4, pp. 550-560, XP009031924, Jul. 2003.
E. Doelker, “Modifications cristallines et transformations polymorphes au cours des opérations galéniques”, Annales Pharmaceutiques Francaises, vol. 60, No. 3, pp. 161-176, XP009003219, 2002.

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