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Process for the manufacture of a precursor of vitamin B1
US9108925B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9108925-B2 |
| Application number | US-79595706-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 24, 2006 |
| Priority date | Jan 28, 2005 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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The present invention relates to a novel process for the manufacture of Grewe-diamine comprising the following step: hydrolyzing a compound of formula (II), wherein R is hydrogen or straight- or branched chain C1-4 alkyl, with an aqueous alkali or alkaline-earth metal hydroxide solution, characterized in that the hydrolysis is carried out in the presence of an organic solvent.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for the manufacture of Grewe-diamine with purity of at least 94% comprising: hydrolyzing a compound of the formula II wherein R is hydrogen or straight- or branched-chain C 1-4 alkyl, with an aqueous alkali or alkaline-earth metal hydroxide solution characterized in that the hydrolysis is carried out in the presence of an organic solve…
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- C07D239/42Primary
Chemistry & Metallurgy · mapped topic
- C07D417/06Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US9108925B2 cover?
- The present invention relates to a novel process for the manufacture of Grewe-diamine comprising the following step: hydrolyzing a compound of formula (II), wherein R is hydrogen or straight- or branched chain C1-4 alkyl, with an aqueous alkali or alkaline-earth metal hydroxide solution, characterized in that the hydrolysis is carried out in the presence of an organic…
- Who is the assignee on this patent?
- Bonrath Werner, Fischesser Jocelyn, Giraudi Lisa, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C07D239/42. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 18 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).