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US-2024390292-A1 · Nov 28, 2024 · US
Crystal of cyclic phosphonic acid sodium salt and method for manufacturing same
US9908909B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9908909-B2 |
| Application number | US-201515501525-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 12, 2015 |
| Priority date | Aug 12, 2014 |
| Publication date | Mar 6, 2018 |
| Grant date | Mar 6, 2018 |
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Abstract
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An object of the present invention is to provide a 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 crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1): the method comprising step (H) of reacting a cyclic phosphonic acid ester represented by formula (9): wherein R 1 represents alkyl, arylalkyl, or aryl with a sodium halide in an organic solvent.
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having oxygen as a ring hetero atom, e.g. fosfomycin · CPC title
- A61P19/00Primary
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- What does patent US9908909B2 cover?
- An object of the present invention is to provide a 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
- What technology area does this patent fall under?
- Primary CPC classification A61P19/00. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Mar 06 2018 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).