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2005
Pyridine derivatives
R 0380
Synthesis and Herbicidal Activity of 2-Cyano-3-(2-fluoro-5-pyridyl)methylami— Analogues of a previously synthesized herbicide are prepared by re35- 165 noacrylates.
placing the chlorine at the phenyl ring by fluorine and by substituting the thiomethyl
group at the 3-position of the double bond. The aromatic part (V) is prepared via
Schiemann reaction, cf. (I)→(II), and combined with acrylates (VI) to give the targets
(VII). Acrylates (VII) exhibit excellent herbicidal activities to amaranth pigweed and
rape in post-emergence treatment. A suitable substituent at the 3-position of acrylate is
essential for high activity. — (LIU, Y.; ZHAO, Q.; WANG*, Q.; LI, H.; HUANG, R.;
LI, Y.; J. Fluorine Chem. 126 (2005) 3, 345-348; State Key Lab. Elem.-Org. Chem.,
Nankai Univ., Tianjin 300071, Peop. Rep. China; Eng.) — H. Hoennerscheid
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