Processes for the preparation of pesticidal compounds

• US 9,108,946 B2
• Filed: 10/17/2014
• Issued: 08/18/2015
• Est. Priority Date: 10/17/2013
• Status: Expired due to Fees

• Current Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Yang, Qiang, Lorsbach, Beth, Whiteker, Gregory T., Roth, Gary, DeAmicis, Carl, Knueppel, Daniel I., Buysse, Ann M., Gray, Kaitlyn, Li, Xiaoyong, Muhuhi, Joseck M., Ross, Ronald Jr., Podhorez, David E., Zhang, Yu
• Primary Examiner(s): Morris, Patricia L
• Application Number:
  US14/517,591
• Publication Number:
  US 20150112078A1
• Time in Patent Office: 305 Days
• Field of Search: 546/275.4
• US Class Current: 1/1
• CPC Class Codes: A01N 43/56 1,2-Diazoles; Hydrogenated 1,2-diazoles
• CPC Class Codes: C07D 401/04 directly linked by a ring-member-to-ring-member bond

Abstract

The present application provides processes for making pesticidal compounds and compounds useful both as pesticides and in the making of pesticidal compounds.

Claims

1. A process comprising oxidizing dihydropyrazole chloride (5a) to yield 3-(3-chloro-1H-pyrazol-1-yl)pyridine (5b)

2. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

3. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

4. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

5. The process according to claim 2, wherein dihydropyrazole chloride (5a)

6. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

7. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

8. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine

9. The process according to claim 6, wherein 3-(3-amino-1H-pyrazol-1-yl)pyridine (8a)

10. The process according to claim 6, wherein 3-(3-amino-1H-pyrazol-1-yl)pyridine (8a)

11. The process according to claim 6, wherein 3-(3-amino-1H-pyrazol-1-yl)pyridine (8a)

12. The process according to claim 1, wherein 3-(3-chloro-1H-pyrazol-1-yl)pyridine