RENGA, JAMES M.,ZHU, YUANMING,WHITEKER, GREGORY T.,CHOY, NAKYEN,STOCKMAN, KENNETH E.
申请号：
CA2954276
公开号：
CA2954276A1
申请日:
2015.07.08
申请国别(地区):
CA
年份:
2016
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.
