RENGA JAMES M,ZHU YUANMING,WHITEKER GREGORY T,CHOY NAKYEN,STOCKMAN KENNETH E
申请号：
IN201717001271
公开号：
IN201717001271A
申请日:
2017.01.12
申请国别(地区):
IN
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.
