- Patent Title: Processes for the preparation of 4-alkoxy-3-hydroxypicolinic acids
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Application No.: US16071516Application Date: 2017-01-23
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Publication No.: US10550083B2Publication Date: 2020-02-04
- Inventor: Kenneth E. Stockman , Gregory T. Whiteker , Erich J. Molitor , Nakyen Choy
- Applicant: Dow AgroSciences LLC
- Applicant Address: US IN Indianapolis
- Assignee: Dow AgroSciences LLC
- Current Assignee: Dow AgroSciences LLC
- Current Assignee Address: US IN Indianapolis
- International Application: PCT/US2017/014532 WO 20170123
- International Announcement: WO2017/127794 WO 20170727
- Main IPC: C07D213/803
- IPC: C07D213/803 ; C07D213/84 ; C07D213/79

Abstract:
4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction that are conducted as a single pot process. 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement.
Public/Granted literature
- US20190112271A1 PROCESSES FOR THE PREPARATION OF 4-ALKOXY-3-HYDROXYPICOLINIC ACIDS Public/Granted day:2019-04-18
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