反应详情

3-Fluoroaniline (1.4 g, 11.6 mmol, 1.2 mL) and 2-fluoroethyl tosylate (12; prepared according to Example 2(a)) (2.5 g, 11.6 mmol) and lutidine (1.24 g, 11.6 mmol) were stirred and heated in DMF (5 mL) 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 184 mg (10%) of (2-fluoro-ethyl)-(3-fluoro-phenyl)-amine (43) as a yellow oil. The structure was confirmed by 1H NMR (300 MHz, CDCl3) δH 3.37 (1H, q, J=6 Hz, NCH2CH2F), 3.46 (1H, q, J=6 Hz, NCH2CH2F), 4.12 (1H, s, br, NH), 4.54 (1H, t, J=3 Hz, NCH2CH2F), 4.69 (11H, t, J=3 Hz, NCH2CH2F), 6.31-6.50 (3H, m, NCCHCHCH), 7.10-7.25 (1H, m, NCCHCF).

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)