Therapeutics & Vaccines
Procedure For Crystallization Of (22e)-(24r)-2-Methylene-22-Dehydro-1alpha,24,25-Trihydroxy-19-Nor-Vitamin D3
WARF: P180077US02
Inventors: Hector DeLuca, Margaret Clagett-Dame, Lori Plum, Agnieszka Flores, James Thoden, Hazel Holden
The Invention
Disclosed are methods of purifying the compound (22E)-(24R)-2-methylene-22-dehydro-1α,24,25-trihydroxy-19-nor-vitamin D3 to obtain the compound in crystalline form. The methods typically include the steps of dissolving (22E)-(24R)-2-methylene-22-dehydro-1α,24,25-trihydroxy-19-nor-vitamin D3 in a solvent comprising ethyl acetate and hexane to form a solution, allowing crystals of (22E)-(24R)-2-methylene-22-dehydro-1α,24,25-trihydroxy-19-nor-vitamin D3 to form and precipitate from the solution, and recovering the crystals of (22E)-(24R)-2-methylene-22-dehydro-1α,24,25-trihydroxy-19-nor-vitamin D3 from the solution.
Additional Information
For More Information About the Inventors
Tech Fields
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