Phosphorus oxychloride → 5-methyl-7-[3-(trifluoromethyl)phenyl]-N-(3,4,5-trimethoxyphenyl)imidazo[5,1-f][1,2,4]triazin-2-amine

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In a similar manner as described for Example 1, 3-(trifluoromethyl)-N-(1-{3-[(3,4,5-trimethoxyphenyl)amino]-1,2,4-triazin-6-yl}ethyl)benzamide (Intermediate 14) (0.12 g, 0.25 mmol) in 1,2-dichloroethane (20 mL) and phosphorus oxychloride (0.28 mL, 3.0 mmol) gave 5-methyl-7-[3-(trifluoromethyl)phenyl]-N-(3,4,5-trimethoxyphenyl)imidazo[5,1-f][1,2,4]triazin-2-amine (0.0038 g) as a yellow solid. 1H NMR (CD3OD): δ9.08 (s, 1H), 8.72 (d, J=7.7 Hz, 1H), 8.59 (s, 1H), 7.76-7.65 (m, 2H), 7.00 (s, 2H), 6.99 (s, 1H), 3.76 (s, 3H), 3.74 (s, 6H), 2.60 (s, 3H). MS m/z 460 (M+1).

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