Preparation and purification of mupirocin calcium
The present invention relates to methods for the preparation and purification of mupirocin calcium. The process comprises adsorbing mupirocin to a hydrophobic adsorbent resin, exposing the bound mupirocin to a calcium-containing solution, washing impurities from the resin and eluting purified mupirocin calcium from the resin.
1. A method for purifying mupirocin calcium comprising adsorbing a preparation of mupirocin to a hydrophobic solid support to produce bound mupirocin, exposing the bound mupirocin to a soluble calcium-containing agent to produce mupirocin calcium, washing the bound mupirocin calcium, and eluting purified mupirocin calcium from the solid support.
2. The method of claim 1 wherein the preparation of mupirocin is prepared by fermenting a mupirocin-producing culture of Pseudomonas fluorescens , obtaining the fermentation broth produced thereby, and optionally clarifying the broth by filtration.
3. The method of claim 1 wherein the solid support is a hydrophobic adsorbent resin.
4. The method of claim 3 wherein the resin comprises modified silica, a polystyrene or an acrylic material.
5. The method of claim 4 wherein the resin comprises acrylic adsorbent XAD7HP, or the polystyrene divinylbenzene adsorbents XAD1600 or XAD4.
6. The method of claim 1 wherein the mupirocin calcium is further purified by crystallization.
7. The method of claim 1 wherein the mupirocin calcium is purified to at least 50%.
8. The method of claim 1 wherein the mupirocin calcium is purified to at least 65%.
9. The method of claim 1 wherein the mupirocin calcium is purified to at least 90%.
10. The method of claim 1 wherein a base is added to the preparation of mupirocin to aid adsorption to the solid support.
11. The method of claim 1 wherein the calcium-containing agent comprises calcium acetate, calcium chloride, calcium nitrate or calcium propionate.
12. The method of claim 1 wherein the preparation of mupirocin is in the form of pseudomonate, ammonium sulfate solution is added to the preparation of mupirocin to aid adsorption of the mupirocin to the solid support, the solid support is the acrylic adsorbent XAD7HP or the polystyrene divinylbenzene adsorbent XAD 1600, the calcium containing agent is calcium acetate, and the purified mupirocin calcium is eluted using an organic solvent.
13. The method of claim 1 wherein the preparation of mupirocin is in the form of mupirocin acid, ammonium sulfate solution is added to the preparation of mupirocin to aid adsorption of the mupirocin to the solid support, the solid support is the polystyrene divinylbenzene adsorbent XAD4, the calcium-containing agent is calcium chloride and the purified mupirocin calcium is eluted using an organic solvent.
14. The method of claim 11 wherein the calcium-containing solution comprises calcium acetate.
15. The method of claim 11 wherein the calcium-containing solution comprises calcium chloride.
16. The method of claim 1 wherein mupirocin calcium is eluted from the solid support using an organic solvent.
17. The method of claim 16 wherein the organic solvent comprises methanol.
18. The method of claim 1 wherein the mupirocin is in the form of pseudomonate, ammonium sulfate solution is added to the mupirocin to aid adsorption of the mupirocin to the solid support, the solid support is the acrylic adsorbent XAD7HP or the polystyrene divinylbenzene adsorbent XAD 1600 and the mupirocin calcium is eluted using an organic solvent.
19. The method of claim 1 wherein the mupirocin is in the form of mupirocin acid, ammonium sulfate solution is added to the mupirocin to aid adsorption of the mupirocin to the solid support, the solid support is the polystyrene divinylbenzene adsorbent XAD4, the calcium-containing solution is calcium chloride and the mupirocin calcium is eluted using an organic solvent.