反应详情

温度

60 °C

To a solution of methyl 5-({4-[(4-butylphenyl)ethynyl]benzyl}amino)-2-fluorobenzoate (300 mg; 0.72 mmol) in DCE (15 mL) were added isobutyraldehyde (Aldrich, 0.16 ml, 1.81 mmol) and triacetoxyborohydride (229 mg; 1.08 mmol). The reaction mixture was stirred at 60° C. under N2 atmosphere for 4 hours. The mixture was poured into NaHCO3 (100 mL), then the product was extracted with DCM (2×100 mL), washed with brine (100 mL), dried over magnesium sulfate and filtrated. The solvents were removed under reduced pressure. Purification of this crude by flash chromatography on silicagel (c-Hex/EtOAc, gradient 8:2 to 5:5 to 3:7) then by HPLC preparative with a X-Terra column gave 62 mg (19%) of the title compound as a brown oil. HPLC: 6.19 min (purity=96.4%), LC/MS: M+(ESI): 472.4. 1H NMR (CDCl3) δ: 7.44 (d, J=5.6 Hz, 2H), 7.41 (d, J=5.3 Hz, 2H), 7.25 (m, 1H), 7.14 (t, J=7.5 Hz, 4H), 6.94 (t, J=9.6 Hz, 1H), 6.80 (m, 1H), 4.57 (s, 2H), 3.90 (s, 3H), 3.45 (m, 1H), 3.25 (d, J=7.2 Hz, 2H), 2.61 (t, J=7.7 Hz, 2H), 2.05 (m, 1H), 1.60 (m, 2H), (s, J=7.4 Hz, 2H), 0.95 (m, 9H).

1. extractionthe product was extracted with DCM (2×100 mL)
2. washwashed with brine (100 mL)
3. dry with materialdried over magnesium sulfate
4. filtrationfiltrated
5. customThe solvents were removed under reduced pressure
6. customPurification of this crude by flash chromatography on silicagel (c-Hex/EtOAc, gradient 8:2 to 5:5 to 3:7)