反应详情

温度

120 °C

A mixture of (S)-1-(4-chloro-1-phenyl-1H-benzoimidazol-2-yl)ethylamine from Example 9 (250 mg, 0.92 mmol), 6-chloro-9H-purine (200 mg, 1.29 mmol) and DIPEA (0.29 mL, 1.66 mmol) in n-butanol (2 mL) was stirred in a sealed tube for 16 h at 120° C. Additional amounts of 6-chloro-9H-purine (100 mg, 0.64 mmol) and DIPEA (0.14 mL, 0.802 mmol) were added and the stirring was continued at 120° C. for 24 h. After cooling to RT, the crude reaction mixture was partitioned between DCM and water. The aqueous phase was further extracted with DCM (×3) and then the combined organic layers were washed with brine, dried (Na2SO4) and concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 0-8% 2M NH3/MeOH in DCM) and then by preparative HPLC (Phenomenex Gemini 5 μm C18 on a 60 min gradient 20-98% 0.1% HCO2H in acetonitrile/water) affording 120 (66 mg, 42%). LCMS: RT 3.69 min [M+H]+ 390.0. 1H NMR (CDCl3, 400 MHz): δ 12.90 (1H, bs), 8.28-7.90 (3H, m), 7.71-7.41 (5H, m), 7.32 (1H, d, J=7.75 Hz), 7.19 (1H, t, J=7.90 Hz), 7.03 (1H, d, J=8.10 Hz), 5.46 (1H, br), 1.67-1.53 (3H, m)

1. waitthe stirring was continued at 120° C. for 24 h
2. temperatureAfter cooling to RT
3. customthe crude reaction mixture
4. customwas partitioned between DCM and water
5. extractionThe aqueous phase was further extracted with DCM (×3)
6. washthe combined organic layers were washed with brine
7. dry with materialdried (Na2SO4)
8. concentrationconcentrated in vacuo
9. customThe resulting residue was purified by column chromatography (Si—PCC, gradient 0-8% 2M NH3/MeOH in DCM)