Release reagent for vitamin d compounds
US-2017363649-A1 · Dec 21, 2017 · US
Crystallization of (20R)-2-methylene-19-nor-24-difluoro-1α,25-dihydroxyvitamin D3
US8940916B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940916-B2 |
| Application number | US-201313828195-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 14, 2013 |
| Priority date | May 30, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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Disclosed are methods of purifying the compound (20R)-2-methylene-19-nor-24-difluoro-1α,25-dihydroxyvitamin D 3 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.
First claim
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We claim: 1. A compound having the formula: in crystalline form, and named (20R)-2-methylene-19-nor-24-difluoro-1α,25-dihydroxyvitamin D 3 . 2. A crystalline form of (20R)-2-methylene-19-nor-24-difluoro-1α,25-dihydroxyvitamin D 3 having molecular packing arrangement defined by space group C2 and unit cell dimensions a=23.84Å b=6.27Å c=20.71 Å α=90°,…
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- C07C401/00Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8940916B2 cover?
- Disclosed are methods of purifying the compound (20R)-2-methylene-19-nor-24-difluoro-1α,25-dihydroxyvitamin D 3 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 fo…
- Who is the assignee on this patent?
- Wisconsin Alumni Res Found
- What technology area does this patent fall under?
- Primary CPC classification C07C401/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).