反应详情

To conc ammonium hydroxide (28%, 9.8 mL, 70 mmol) at 0° C. was added cautiously a solution of 2,5-dimethyl-1-(2-trifluoromethyl-phenyl)-1H-pyrrole-3-carbonyl chloride (2.1 g, 7.0 mmol) in THF (10 mL). After 10 min the reaction mixture was removed from the ice-bath and allowed to stir at ambient temperature. After 1 h the mixture was added to satd NH4Cl (30 mL) and extracted with DCM (3×30 mL). The combined extracts were washed with water (2×50 mL) and brine (50 mL), dried (anhyd Na2SO4) and concentrated under reduced pressure to afford the title compound (1.9 g, 96%) as a pale brown solid, which was used without purification in the next step. 1H-NMR (DMSO-d6) δ 7.98 (1H, d, J=7.8), 7.88 (1H, app t, J=7.8), 7.78 (1H, app t, J=7.8), 7.44 (1H, d, J=7.8), 7.17 (1H, brs), 6.66 (1H, brs), 6.35 (1H, s), 2.07 (3H, s), 1.81 (3H, s).

1. customAfter 10 min the reaction mixture was removed from the ice-bath
2. additionAfter 1 h the mixture was added to satd NH4Cl (30 mL)
3. extractionextracted with DCM (3×30 mL)
4. washThe combined extracts were washed with water (2×50 mL) and brine (50 mL)
5. dry with materialdried (anhyd Na2SO4)
6. concentrationconcentrated under reduced pressure