Process for the preparation of amorphous form of torsemide

Details Process for the preparation of amorphous form of torsemide Process for the preparation of amorphous form of torsemide

2006-02-21

2006-02-21

Richter, Johann (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S293000, C546S294000, C546S346000

Reexamination Certificate

active

07002018

ABSTRACT:
The present invention relates to a simple and efficient process for the preparation of amorphous form of torsemide. The process includes recovering amorphous torsemide from a solution thereof in a suitable solvent comprising alcohols, ketones, chlorinated hydrocarbons, esters, nitriles, cyclic ethers, and mixtures thereof, by spray drying.

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Dupont et al., “Structure d'une Seconde Variété de la Torasémide”,Acta. Cryst., B34:2659-2662 (1978).
Dupont et al., “Structure Cristalline et Moléculaire d'un Diurétique de l'Alkyl-1 [(Phénylamino-4 pyridyl-3)sulfonyl]-3 Urée:la Torasémide (C15H20N4SO3)”,Acta. Cryst., B34:1304-1310 (1978).

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