Crystal of cyclic phosphonic acid sodium salt and method for manufacturing same
US-10385081-B2 · Aug 20, 2019 · US
Crystal of cyclic phosphonic acid sodium salt and method for manufacturing same
US10774100B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10774100-B2 |
| Application number | US-201916460332-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 2, 2019 |
| Priority date | Aug 12, 2014 |
| Publication date | Sep 15, 2020 |
| Grant date | Sep 15, 2020 |
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- Title
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Abstract
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An object t of the present invention is to proroaide crystal of a cyclic phosphonic acid sodium salt (2ccPA) with high purity and excellent storage stability and a method for producing the crystal. The present invention provides a crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1):
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a compound represented by formula (6): wherein two R 1 groups are the same or different and represent alkyl, arylalkyl, or aryl; and two R 2 groups are the same or different and represent alkyl, cycloalkyl, or aryl, the method comprising step (I)) of reacting a compound represented by formula (5): wherein R 2 is as defined above; and X represents a halogen atom with a phosphorous acid diester.
Assignees
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Classifications
- C07F9/65748Primary
the cyclic phosphorus atom belonging to more than one ring system · CPC title
- A61P19/00Primary
Drugs for skeletal disorders · CPC title
- C07F9/657163Primary
the ring phosphorus atom being bound to at least one carbon atom · CPC title
Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID] · CPC title
the ring phosphorus atom and, at least, one ring oxygen atom being part of a (thio)phosphonic acid derivative · CPC title
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- What does patent US10774100B2 cover?
- An object t of the present invention is to proroaide crystal of a cyclic phosphonic acid sodium salt (2ccPA) with high purity and excellent storage stability and a method for producing the crystal. The present invention provides a crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1):
- Who is the assignee on this patent?
- Otsuka Chemical Co Ltd, Otsuka Checmial Co Ltd, Sansho Co
- What technology area does this patent fall under?
- Primary CPC classification C07F9/65748. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 15 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).