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0 °C

A solution of 4-chloro-6-fluoro-[1,7]naphthyridine-3-carbonitrile (0.75 g, 3.62 mmol) and 3-isopropylaniline (0.82 mL, 5.79 mmol) in ethanol (11 mL) was heated to 80° C. for 10 hours. The reaction was cooled to 0° C., water was added and the mixture was stirred for 15 minutes. The product was filtered, washed with water and dried in the vacuum oven to provide pure 6-fluoro-4-[(3-isopropylphenyl)amino]-1,7-naphthyridine-3-carbonitrile (0.88 g, 80%). 1H NMR (400 MHz, DMSO-D6) δ ppm 1.2 (d, J=7.1 Hz, 6 H) 2.9 (dq, J=6.9 Hz, 1 H) 7.2 (m, 3 H) 7.4 (t, J=7.8 Hz, 1 H) 8.2 (s, 1 H) 8.6 (s, 1 H) 9.1 (s, 1 H) 10.1 (s, 1 H).

1. filtrationThe product was filtered
2. washwashed with water
3. customdried in the vacuum oven