Process for the preparation of 4-amino-5-fluoro-3-chloro-6-(substituted)picolinates

• US 9,212,141 B2
• Filed: 12/12/2013
• Issued: 12/15/2015
• Est. Priority Date: 12/13/2012
• Status: Active Grant

• Current Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Renga, James M., Whiteker, Gregory T., Johnson, Peter L., Galliford, Christopher
• Primary Examiner(s): CHANDRAKUMAR, NIZAL S
• Application Number:
  US14/104,197
• Publication Number:
  US 20140171653A1
• Time in Patent Office: 733 Days
• Field of Search: 546/250
• US Class Current: 1/1
• CPC Class Codes: C07C 251/12 being acyclic
• CPC Class Codes: C07D 213/72 Nitrogen atoms nitro radicals C07D213/61
• CPC Class Codes: C07D 213/73 Unsubstituted amino or imino radicals
• CPC Class Codes: C07D 213/74 Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals
• CPC Class Codes: C07D 213/79 Acids; Esters
• CPC Class Codes: C07D 213/803 Processes of preparation

Abstract

4-Amino-5-fluoro-3-chloro-6-(substituted)picolinates are prepared from trifluoroacetic acid, p-methoxyaniline, a 3,3-dialkoxyprop-1-yne and a substituted methylene amine by a series of steps.

Claims

1. A process for the preparation of a 4-amino-5-fluoro-3-chloro-6-(substituted)picolinate of the Formula I