| 摘要 |
PURPOSE: A process for producing a new pyridine derivative is provided. The pyridine derivative can be effectively used in production of fluoroalkylpyridine-sulfonyl urea derivatives exhibiting excellent herbicidal activity as a herbicide intermediate. CONSTITUTION: A pyridine derivative of the formula(1) useful as an intermediate of fluoroalkylpyridine-sulfonyl urea derivatives of the formula(2) is obtained by reacting a compound of the formula(6) with a copper(II) salt of CuY'2 in the presence of a solvent to give a compound of the formula(1c), or reacting the compound of the formula(1c) with a compound(MF) in the presence of a solvent and optionally a phase transfer catalyst to give a compound of the formula(1b). In formula, R1 is H, cyano, C1-4 alkyl, C3-6 cycloalkyl, C1-4 alkylcarbonyl, C1-4 alkoxymethyl, or -C(=S)OEt, 1-5 substituted benzyl substituted with a substituent selected from halogen, C1-4 alkyl and C1-4 alkoxy or non-substituted benzyl, or SQ in which Q is pyridine radicals; R2 is H or C1-4 alkyl; and Y exhibits halogen.
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