Process for the preparation of 3-(3-chloro-1H-pyrazol-1-yl)pyridine
US-9115115-B1 · Aug 25, 2015 · US
Processes for the preparation of pesticidal compounds
US9580405B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9580405-B2 |
| Application number | US-201615166784-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 27, 2016 |
| Priority date | Oct 17, 2013 |
| Publication date | Feb 28, 2017 |
| Grant date | Feb 28, 2017 |
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Abstract
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The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.
First claim
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What is claimed is: 1. A process for producing 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b) said process comprising (a) reacting 3-hydrazinopyridine dihydrochloride with methyl 2-acetamidoacrylate to yield N-(3-oxo-1-(pyridin-3-yl)pyrazolidin-4-yl)acetamide; and (b) chlorinating/eliminating N-(3-oxo-1-(pyridin-3-yl)pyrazolidin-4-yl)acetamide to yield 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b) 2. The process of claim 1 , wherein step (a) is carried out in the presence of sodium ethoxide. 3. The process of claim 1 , wherein step (a) is carried out in the presence of ethanol. 4. The process of claim 3 , wherein step (a) is carried out in the presence of sodium ethoxide. 5. The process of claim 1 , wherein step (b) is carried out in the presence of POCl 3 . 6. The process of claim 2 , wherein step (b) is carried out in the presence of POCl 3 . 7. The process of claim 3 , wherein step (b) is carried out in the presence of POCl 3 . 8. The process of claim 4 , wherein step (b) is carried out in the presence of POCl 3 .
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Classifications
- C07D401/04Primary
directly linked by a ring-member-to-ring-member bond · CPC title
the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides · CPC title
1,2-Diazoles; Hydrogenated 1,2-diazoles · CPC title
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Frequently asked questions
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- What does patent US9580405B2 cover?
- The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.
- Who is the assignee on this patent?
- Dow Agrosciences Llc
- 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 Feb 28 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).