Purification of rosuvatatin intermediate by thin film evaporation and chemical method
AssigneeTeva Pharmaceutical Industries Ltd.
InventorsTamar Nidam, Omer Malachi, Irena Veinberg, Valerie Niddam-Hildesheim, Vinod Kumar Kansal, Harish Ranjan, Appu Ekambaram Ponnuswamy, Sunil Rokad, Surat Kiran, Debashish Das
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Abstract
Provided are processes for the purification of a pure rosuvastatin intermediate by thin film evaporation and chemical method, and conversion of the intermediate to rosuvastatin or salts thereof.
Claims37
A process for purifying rosuvastatin intermediate t-butyl (3R)-3-(t-butyldimethylsilyloxy)-6-dimethoxyphosphinyl-5-oxohexanoate (19TBPO) of the following formula:
- comprising carrying out thin film evaporation.
7-29. (canceled)
A process for purifying 19TBPO comprising combining composition containing 19TBPO with basic and/or oxidizing agents, and then extracting the 19TBPO into a water immiscible organic solvent.
59-92. (canceled)
Dependencies are inferred from the claim text.