CRYSTALLIZATION OF (20R,22R)-2-METHYLENE-19-NOR-22-METHYL-1alpha ,25-DIHYDROXYVITAMIN D3 AND RELATED PRECURSORS
申请人:Wisconsin Alumni Research Foundation
公开号:EP2855430A1
公开(公告)日:2015-04-08
[EN] CRYSTALLIZATION OF (20R,22R)-2-METHYLENE-19-NOR-22-METHYL-1alpha,25-DIHYDROXYVITAMIN D3 AND RELATED PRECURSORS<br/>[FR] CRISTALLISATION DE (20R,22R)-2-MÉTHYLÈNE-19-NOR-22-MÉTHYL-1Alpha,25-DIHYDROXYVITAMINE D3 ET PRÉCURSEURS CORRESPONDANTS
申请人:WISCONSIN ALUMNI RES FOUND
公开号:WO2013180881A1
公开(公告)日:2013-12-05
Disclosed are methods of purifying the compound (20R,22R)-2-metJiylene-19- nor-22-methyl-1α,25-dihydroxyvitamin D3 to obtain the compound in crystalline form. The methods typically include the steps of dissolving a product containing the compound in a solvent comprising hexane and 2-propanol, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of crystals, and recovering the crystals. Certain diol precursors formed during the synthesis of the compound and its diasteromers also may be obtained in crystalline form using ethyl acetate as a solvent.
[EN] CRYSTALLIZATION OF (20R) AND (20S) ANALOGS OF 2-METHYLENE-19-NOR-22-DIMETHYL-1ALPHA,25-DIHYDROXYVITAMIN D3<br/>[FR] CRISTALLISATION D'ANALOGUES (20R) ET (20S) DE 2-MÉTHYLÈNE-19-NOR-22-DIMÉTHYL-1ALPHA,25-DIHYDROXYVITAMINE D3
申请人:WISCONSIN ALUMNI RES FOUND
公开号:WO2013180879A1
公开(公告)日:2013-12-05
Disclosed are methods of purifying (20R) and (20S) analogs of 2-methylene-19- nor-22-dimethyl-1α,25-dihydroxyvitamin D3 to obtain the (20R) and (20S) analogs in crystalline form. The method includes the steps of preparing a solvent of either diethyl ether or a mixture of 2-propanol and hexane, dissolving a product containing the (20R) and (20S) analog to be purified in the solvent, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of crystals, and recovering the crystals.