RENGA, James M.,ZHU, Yuanming,WHITEKER, Gregory T.,CHOY, Nakyen,STOCKMAN, Kenneth E.
申请号：
EP15819075
公开号：
EP3166612A4
申请日:
2015.07.08
申请国别(地区):
EP
年份:
2017
代理人:
摘要：
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. 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.
