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

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2-methoxy-N-(1-{3-[(3,4,5-trimethoxyphenyl)amino]-1,2,4-triazin-6-yl}ethyl)benzamide (Intermediate 25) (27 mg, 0.06 mmol) in 1,2-dichloroethane (4 mL) was added phosphorus oxychloride (45 microL, 0.5 mmol). The mixture was heated to reflux for 4 hours. After cooling to room temperature, the mixture was diluted with DCM (150 mL) and aqueous (saturated) Na2CO3 (25 mL). The aqueous layer was extracted with dichloromethane (DCM) and the combined organic layers were washed with brine, dried over Na2SO4, concentrated under vacuum, and purified by reverse-phase HPLC to give 7-(2-methoxyphenyl)-5-methyl-N-(3,4,5-trimethoxyphenyl)imidazo[5,1-f][1,2,4]triazin-2-amine (0.005 g) as a yellow solid. 1H NMR (CDCl3): δ8.80 (s, 1H), 7.59 (dd J=7.51, 1.65 Hz, 1H), 7.44 (m, 1H), 7.00-7.07 (m, 3H), 6.84 (s, 1H), 3.78 (s, 6H), 3.59 (s, 6H), 2.63 (s, 3H). MS m/z 421 (M+1).

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