反应详情

温度

120 °C

A flask was charged with 5-(6-chloro-1-methyl-1H-benzo[d]imidazol-2-yl)nicotinaldehyde (100 mg, 0.368 mmol), ethanesulfonamide (80 mg, 0.736 mmol) and toluene (3 mL), and titanium isopropoxide (157 mg, 0.552 mmol) was added dropwise. The mixture was stirred at 120° C. overnight. The mixture was concentrated in vacuo and the residue was taken up in DCM (20 mL) and MeOH (20 mL), and NaBH4 (0.0557 g, 1.47 mmol) was added at 0° C. The mixture was stirred at 0° C. for 30 min. Water (1 mL) was added and the mixture was stirred for 5 min. DMF (5 mL) was added and the suspension was filtered. The filtrate was purified by Xbridge RP 18 eluting with a 20 to 70% ACN-water gradient to give the title compound. HRMS: (ESI) m/z 365.0839 [(M+H)+ Calcd for C16H18ClN4O2S 365.0834]. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.21 (t, J=7.33 Hz, 3H) 3.06 (q, J=7.33 Hz, 2H) 3.92 (s, 3H) 4.33 (s, 2H) 7.30 (dd, J=8.46, 2.15 Hz, 1H) 7.73 (d, J=8.59 Hz, 1H) 7.77 (s, 1H) 7.86 (d, J=2.02 Hz, 1H) 8.25 (t, J=2.02 Hz, 1H) 8.72 (d, J=2.02 Hz, 1H) 8.97 (d, J=2.27 Hz, 1H).

1. additionwas added dropwise
2. concentrationThe mixture was concentrated in vacuo
3. stirringThe mixture was stirred at 0° C. for 30 min
4. stirringthe mixture was stirred for 5 min
5. filtrationthe suspension was filtered
6. customThe filtrate was purified by Xbridge RP 18 eluting with a 20 to 70% ACN-water gradient