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
US9862702B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9862702-B2 |
| Application number | US-201715498691-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 27, 2017 |
| Priority date | Oct 17, 2013 |
| Publication date | Jan 9, 2018 |
| Grant date | Jan 9, 2018 |
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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 comprising dehydrocyanating 3-chloro-1-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole-5-carbonitrile (6b) in the presence of a base, to yield 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b) 2. The process of claim 1 , wherein the base is an organic base. 3. The process of claim 1 , wherein the base is 1, 8-diazabicyclo-[5.4.0] undec-7-ene (DBU) or 1,5-diazabicyclo [4.3.0] non-5-ene (DBN). 4. The process of claim 1 , wherein the base is an inorganic base. 5. The process of claim 1 , wherein the base is potassium hydroxide. 6. The process of claim 1 , wherein the dehydrocyanating is conducted in the presence of a polar solvent. 7. The process of claim 2 , wherein the dehydrocyanating is conducted in the presence of a polar solvent. 8. The process of claim 4 , wherein the dehydrocyanating is conducted in the presence of a polar solvent. 9. The process of claim 1 , wherein the dehydrocyanating is conducted in the presence of a polar solvent selected from the group consisting of N,N-dimethyl-formamide (DMF), ethanol (EtOH), and tetrahydrofuran (THF). 10. The process of claim 2 , wherein the dehydrocyanating is conducted in the presence of a polar solvent selected from the group consisting of N,N-dimethyl-formamide (DMF), ethanol (EtOH), and tetrahydrofuran (THF). 11. The process of claim 4 , wherein the dehydrocyanating is conducted in the presence of a polar solvent selected from the group consisting of N,N-dimethyl-formamide (DMF), ethanol (EtOH), and tetrahydrofuran (THF). 12. The process of claim 1 , wherein the dehydrocyanating is conducted at a temperature of from about −10° C. to about 30° C. 13. The process of claim 2 , wherein the dehydrocyanating is conducted at a temperature of from about −10° C. to about 30° C. 14. The process of claim 4 , wherein the dehydrocyanating is conducted at a temperature of from about −10° C. to about 30° C. 15. The process of claim 7 , wherein the dehydrocyanating is conducted at a temperature of from about −10° C. to about 30° C. 16. The process of claim 8 , wherein the dehydrocyanating is conducted at a temperature of from about −10° C. to about 30° C.
Assignees
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Classifications
- C07D213/77Primary
Hydrazine radicals · CPC title
the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides · CPC title
six-membered rings · CPC title
1,2-Diazoles; Hydrogenated 1,2-diazoles · CPC title
- C07D401/04Primary
directly linked by a ring-member-to-ring-member bond · CPC title
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Frequently asked questions
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- What does patent US9862702B2 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 C07D213/77. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 09 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).