Salt forms of 1-[(4-methyl-quinazolin-2-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-(3-(R)-amino-piperidin-1-yl)-xanthine
US-9212183-B2 · Dec 15, 2015 · US
Process for the preparation of chiral 8-(3-aminopiperidin-1-yl)-xanthines
US9751855B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9751855-B2 |
| Application number | US-201715414694-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 25, 2017 |
| Priority date | Nov 5, 2004 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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- Title
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Abstract
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The invention relates to an improved process for preparing enantiomerically pure 8-(3-aminopiperidin-1-yl)-xanthines.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for preparing (R)-3-(phthalimido)piperidine, comprising: reacting rac-3-aminopiperidine with phthalic anhydride; and precipitating (R)-3-(phthalimido)piperidine by adding D-tartaric acid. 2. A process for preparing (S)-3-(phthalimido)piperidine, comprising: reacting rac-3-aminopiperidine with phthalic anhydride; precipitating (S)-3-(phthalimido)piperidine by adding L-tartaric acid. 3. A process for preparing (R)-3-(phthalimido)piperidine and (S)-3-(phthalimido)piperidine, comprising: reacting rac-3-aminopiperidine with phthalic anhydride; and precipitating (R)-3-(phthalimido)piperidine by adding D-tartaric acid; and precipitating (S)-3-(phthalimido)piperidine by adding L-tartaric acid.
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Immunosuppressants, e.g. drugs for graft rejection · CPC title
for glucose homeostasis (pancreatic hormones A61P5/48) · CPC title
Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00 · CPC title
Anorexiants; Antiobesity agents · CPC title
for hyperglycaemia, e.g. antidiabetics · CPC title
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Frequently asked questions
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- What does patent US9751855B2 cover?
- The invention relates to an improved process for preparing enantiomerically pure 8-(3-aminopiperidin-1-yl)-xanthines.
- Who is the assignee on this patent?
- Boehringer Ingelheim Int
- What technology area does this patent fall under?
- Primary CPC classification C07D401/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 05 2017 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).