反应详情

The product from Example 42D (320 mg, 1.0 mmol) in THF (10 mL) was treated with 2.5M n-butyllithium (0.5 mL, 1.25 mmol) at −78° C. The solution was mixed for 15 min, and treated with a solution of 3-fluoro-N-methoxy-N-methylbenzamide (2.0 mmol) in THF (5.0 mL) at −78° C. The mixture was allowed to warm to room temperature overnight, quenched by 1 mL ethanol, concentrated, and diluted with ethyl acetate. The mixture was washed with 5% NaHCO3 (25 mL×3), 25% brine (25 mL), dried over Na2SO4, filtered, and the filtrate was concentrated to dryness. The residue was purified by column chromatography (heptane:acetone:CH2Cl2:TEA (60:40:5:1) to provide the title compound. The title compound was treated with HCl in IPA:ethyl acetate to give the dihydrochloride salt. mp 162-164° C. (dec.); MS (ESI) 363 (M+H)+; 1H NMR (DMSO-d6) δ 8.79 (1H, d), 8.53 (1H, d), 8.30 (1H, d), 8.21 (1H, dd), 7.82 (1H, d), 7.6 (4H, m), 3.9 (1H, br, m), 3.63 (2H, br, m), 3.50 (2H, br, m), 3.21 (1H, br, m), 2.2 (1H, m), 1.98 (2H, br, m), 1.7 (1H, br, m), 1.46 (1H, m), 1.30 (3H, d).

1. additionThe solution was mixed for 15 min
2. customquenched by 1 mL ethanol
3. concentrationconcentrated
4. additiondiluted with ethyl acetate
5. washThe mixture was washed with 5% NaHCO3 (25 mL×3), 25% brine (25 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationthe filtrate was concentrated to dryness
9. customThe residue was purified by column chromatography (heptane:acetone:CH2Cl2:TEA (60:40:5:1)