2-氨基-3-硝基-5-氟吡啶 、 2,2,3-trifluoropropionic anhydride 在
钯 作用下,
以to obtain 5-fluoro-3-nitro-2-(2,2,3-trifluoropropionamido)pyridine which on hydrogenation over palladium on carbon的产率得到5-fluoro-3-nitro-2-(2,2,3-trifluoropropionamido)pyridine
Substituted 1-hydroxy-2-(1,1-difluoroalkyl)-1H-imidazo-(4,5-b)pyridine compounds useful as herbicides; and intermediates useful in the synthesis of these compounds. In addition to exhibiting herbicidal activity, the substituted 1-hydroxy-2-(1,1-difluoroalkyl)-1H-imidazo(4,5-b)pyridine compounds are of low mammalian toxicity.
Substituted 1-hydroxy-2-(1,1-difluoroalkyl)-1H-imidazo-(4,5-b)pyridine compounds useful as herbicides; and intermediates useful in the synthesis of these compounds. In addition to exhibiting herbicidal activity, the substituted 1-hydroxy-2-(1,1-difluoroalkyl)-1H-imidazo(4,5-b)pyridine compounds are of low mammalian toxicity.