反应详情

To a heterogeneous mixture of 4-(2-fluoro-4-nitrophenoxy)-5-methylpyrrolo[2,1-f][1,2,4]triazine (3.04 g, 10.55 mmol) in anhydrous methanol (60 mL) and anhydrous tetrahydrofuran (40 mL), at ambient temperature under nitrogen atmosphere, was added zinc dust (6.90 g, 105 mmol) and ammonium chloride (5.64 g, 105 mmol). The mixture was stirred for 7 h before the catalyst was filtered off and the filtrate was concentrated in vacuo to a pale yellow solid which was partitioned between chloroform and water. The aqueous layer was then extracted twice with chloroform. The combined chloroform layers were washed with water, dried over anhydrous magnesium sulfate and concentrated in vacuo to yield the title compound (2.51 g, 92%) as a solid. 1H NMR (CDCl3) δ 7.86 (s, 1H), 7.64 (d, 1H, J=2.6 Hz); 7.08–7.03 (m, 1H), 6.61 (d, 1H, J=2.4 Hz), 6.55–6.45 (m, 2H), 3.78 (s, 2H), 2.60 (s, 3H); HRMS(ESI), 259.0995 (M+H)+ calc, 259.0997 (M+H)+ found.

1. filtrationwas filtered off
2. concentrationthe filtrate was concentrated in vacuo to a pale yellow solid which
3. customwas partitioned between chloroform and water
4. extractionThe aqueous layer was then extracted twice with chloroform
5. washThe combined chloroform layers were washed with water
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated in vacuo