Pyridine → 5-(2-chloro-6-fluorophenyl)-2-(4-iodophenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

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Reaktionsschritte

The title a compound was prepared according to the procedure described in step-4 of Intermediate-1 using 2-chloro-6-fluoro-N′-(4-iodophenyl)benzene carbohydrazonamide (0.900 g, 2.31 mmol), pyridine (0.65 mL, 5.79 mmol), phosgene (2.50 mL, 4.63 mmol) and CHCl3 (20 mL). The obtained crude product was purified with column chromatography on silica gel eluting with 1.0% MeOH:DCM to afford 0.400 g of the desired product. 1H NMR (300 MHz, DMSO d6): δ 7.47 (t, J=9.0 Hz, 2H), 7.54-7.82 (m, 5H), 12.62 (s, 1H). MS (m/z): 414.25 (M−H)−.

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