反应详情

温度

100 °C

In a round bottom flask 4-fluoroaniline (1.3 g, 11.6 mmol, 1.6 mL) 2,6-lutidine (1.24 g, 11.6 mmol) and 2-fluoroethyl tosylate (12; prepared according to Example 2(a)) (2.5 g, 11.6 mmol) were combined in DMF (5 mL) and stirred at 100° C. overnight. The reaction was allowed to cool and then diluted with ethyl acetate (100 mL). This was washed with water (3×40 mL) and the organics were dried and concentrated in vacuo. The crude material was purified by silica gel chromatography eluting with petrol (A) and ethyl acetate (B) (10% B, 100 g, 12 CV, 60 mL/min) to afford 383 mg (20%) of (2-fluoro-ethyl)-(4-fluoro-phenyl)-amine (38) as a yellow oil. The structure was confirmed by 1H NMR (300 MHz, CDCl3) δH 3.30-3.35 (1H, m, NCH2CH2F), 3.40-3.45 (1H, m, NCH2CH2F), 3.90 (1H, s, br, NH), 4.53 (1H, t, J=3 Hz, NCH2CH2F), 4.69 (1H, t, J=3 Hz, NCH2CH2F), 6.51-6.72 (2H, m, 2×NCCH), 6.85-7.05 (2H, m, 2×NCCHCH).

1. temperatureto cool
2. washThis was washed with water (3×40 mL)
3. customthe organics were dried
4. concentrationconcentrated in vacuo
5. customThe crude material was purified by silica gel chromatography
6. washeluting with petrol (A) and ethyl acetate (B) (10% B, 100 g, 12 CV, 60 mL/min)