反应详情

温度

105 °C

A solution of 1-(3-bromo-4-fluoro-phenyl)-2-(1-ethyl-5-methanesulfonyl-1H-pyrrol-3-yl)-ethane-1,2-dione (0.32 g, 0.79 mmol) in dioxane and EtOH was treated with N-methylguanidine hydrochloride (0.17 g, 1.6 mmol) and Na2CO3 (0.18 g, 1.66 mmol), heated to 105° C. for 18 h and concentrated in vacuo. The residue was dissolved in CHCl3, washed with H2O and brine, dried (Na2SO4) and evaporated to dryness at reduced pressure. Chromatography of this residue (silica gel, EtOAc and 1%-2% MeOH-EtOAc as eluent) yielded a solid; 1H NMR (400 MHz, CDCl3) δ: 1.44 (t, 3H, J=7.3 Hz), 3.08 (s, 3H), 3.10 (s, 3H), 3.97 (brs, 2H), 4.21 (q, 2H, J=7.3 Hz), 6.85 (d, 1H, J=2.1 Hz), 6.90 (d, 1H, J=2.1 Hz), 7.06 (t, 1H, J=8.5 Hz), 7.51 (m, 1H), 7.77 (dd, 1H, J=2.3, 6.6 Hz).

1. concentrationconcentrated in vacuo
2. dissolutionThe residue was dissolved in CHCl3
3. washwashed with H2O and brine
4. dry with materialdried (Na2SO4)
5. customevaporated to dryness at reduced pressure
6. customChromatography of this residue (silica gel, EtOAc and 1%-2% MeOH-EtOAc as eluent) yielded a solid