反应详情

温度

0 °C

n-Butyllithium (2.5M in hexanes) (48.6 mL, 121.7 mmol) was added dropwise to an ice-cooled solution of methyl triphenylphosphoniumbromide (43.5 g, 121.7 mmol) in THF (500 mL). The mixture was stirred at 0° C. for 1 h then at rt for 2 h. 3-Formyl-N-methyl-1H-indole-2-carboxamide (1.96 g, 9.7 mmol) in THF (100 mL) was added and the mixture stirred at rt for 2 h. The solvent was evaporated and the residue dissolved in ethyl acetate and washed twice with water. The organic phase was dried over magnesium bromide and evaporated in vacuo. The crude mixture was chromatographed over silica gel eluting with 40% ethyl acetate in hexanes to afford the title compound (730 mg (38%). 1H NMR (300 MHz, DMSO-d6) δ 11.48 (s, 1H), 8.04 (s, 1H), 7.92 (d, J=8.0 Hz, 1H), 7.42 (d, J=7.9 Hz, 1H), 7.33 (d, J=18 Hz, 1H), 7.22 (t, J=7.6 Hz, 1H), 7.09 (t, J=7.2 Hz, 1H), 5.77 (d, J=18.4 Hz, 1H), 5.27 (d, J=11.6 Hz, 1H), 2.81 (s, 3H).

1. waitat rt for 2 h
2. stirringthe mixture stirred at rt for 2 h
3. customThe solvent was evaporated
4. dissolutionthe residue dissolved in ethyl acetate
5. washwashed twice with water
6. dry with materialThe organic phase was dried over magnesium bromide
7. customevaporated in vacuo
8. customThe crude mixture was chromatographed over silica gel eluting with 40% ethyl acetate in hexanes