Stabilized doxercalciferol and process for manufacturing the...

Details Stabilized doxercalciferol and process for manufacturing the... Stabilized doxercalciferol and process for manufacturing the...

C - Chemistry, Metallurgy

07

C

C07C 401/00 (2006.01)

Patent

CA 2698160

1.alpha.-hydroxyvitamin D2 (doxercalciferol) of exceptionally high purity and stability is prepared by a process involving chromatographically purifying 1.alpha.- hydroxyvitamin D2 monoacetate, chemically removing the acetate protectant group from the purified product to form 1.alpha.-hydroxyvitamin D2, and precipitating the 1.alpha.- hydroxyvitamin D2 so formed from a mixed organic solvent consisting essentially of at least one C1 - C6 dialkyl ether or C1 - C6 alkyl ester, and at least one C5 - C12 hydrocarbon.

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