Electrochemical reduction of taxoids: Selective preparation of 9-dihydro-, 10-deoxy- and 10-deacetoxy-taxoids
摘要:
The electrochemical reduction of docetaxel in methanol in the presence of ammonium chloride leads to 9 alpha-dihydro-docetaxel 3 and 9 beta-dihydro-docetaxel 4. Under the same conditions, the electrochemical reduction of paclitaxel gives 10-deacetoxy-paclitaxel 7. Calcium chloride as well as magnesium and cerium chloride, and to some extent strontium and lithium chloride, favor IO-dehydroxylation in the docetaxel series. All these docetaxel analogs retain biological activity.
METHOD FOR PREPARATION OF AMORPHOUS, ANHYDROUS CRYSTALLINE OR HYDRATED CRYSTALLINE DOCETAXEL
申请人:Pyo Sang-Hyun
公开号:US20090018353A1
公开(公告)日:2009-01-15
This invention is directed to a method for the preparation of docetaxel having an amorphous, anhydrous crystalline, or hydrated crystalline structure. In accordance with the invention, highly pure amorphous, anhydrous crystalline, or hydrated crystalline docetaxel can be produced with a high yield by using a solvent precipitation method, colloid formation method, etc.
Processes for preparing substantially pure docetaxel, new crystalline forms of docetaxel and processes for preparation thereof, processes for preparing docetaxel trihydrate, and pharmaceutical compositions comprising docetaxel.
The present invention relates to docetaxel and processes for preparing docetaxel, including process-related intermediates. The present invention also relates to processes for preparing substantially pure docetaxel and intermediates.