反应详情

Iodomethane (0.056 mL, 0.90 mmol) was added to methyl 4-(2-(3-(4-ethoxypiperidine-1-carbonyl)-4-fluorophenyl)acetyl)-2,5-dimethyl-1H-pyrrole-3-carboxylate (53) (0.200 g, 0.45 mmol) and potassium carbonate (0.249 g, 1.80 mmol) in DMF (10 mL). The resulting suspension was stirred at room temperature for 2 hours. The reaction mixture was poured into water (75 mL) and extracted with EtOAc (3×50 mL). The combined organic layers were washed with water (50 mL) and saturated brine (50 mL). The organic layer was dried over Na2SO4, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography, elution gradient 0 to 100% ethyl acetate in isohexane. Pure fractions were evaporated to dryness to afford the desired material as a yellow gum (0.158 g, 77% yield); 1H NMR (400.132 MHz, CDCl3) δ 1.14 (3H, t), 1.43-1.65 (2H, m), 1.72 (1H, m), 1.85 (1H, m), 2.05 (3H, s), 2.38 (3H, s), 3.06 (1H, m), 3.32 (3H, s), 3.45 (5H, m), 3.74 (3H, s), 3.91 (2H, s), 3.99 (1H, m), 6.93 (1H, t), 7.08 (1H, m), 7.17 (1H, m); m/z (LC-MS, ESI+), RT=2.15 min (M+H=459.36).

1. extractionextracted with EtOAc (3×50 mL)
2. washThe combined organic layers were washed with water (50 mL) and saturated brine (50 mL)
3. dry with materialThe organic layer was dried over Na2SO4
4. filtrationfiltered
5. customevaporated
6. customto afford crude product
7. customThe crude product was purified by flash silica chromatography, elution gradient 0 to 100% ethyl acetate in isohexane
8. customPure fractions were evaporated to dryness