摘要 |
4-Amino-3-chloro-5-fluoro-6-(substituted)picolinates are conveniently prepared from 3,4,5,6-tetrachloropicolinonitrile by a series of steps involving fluorine exchange, amination, reaction with hydrazine, halogenation, hydrolysis and esterification, and transition metal assisted coupling. |
申请人 |
DOW AGROSCIENCES LLC;ZHU, YUANMING;WHITEKER, GREGORY T.;ARNDT, KIM E.;RENGA, JAMES M.;FROESE, ROBERT D. |
发明人 |
ZHU, YUANMING;WHITEKER, GREGORY T.;ARNDT, KIM E.;RENGA, JAMES M.;FROESE, ROBERT D. |