反应详情

[3-(4-methoxybenzyl)-3H-imidazo[4,5-b]pyridin-7-yl]methanol x183 (0.5 g, 1.86 mmol) is dissolved in dichloromethane (20 ml). SOCl2 (2 ml) is added dropwise. The reaction mixture is refluxed for 1 h. The volatiles are distilled off in the vacuum of a rotary evaporator. Then 50 ml of chloroform is distilled off additionally from the residue. The residual chloroform solution is added dropwise at 0° C. to a vigorously stirred saturated aqueous solution of NaHCO3. The organic phase is separated, dried with anhydrous sodium sulfate, and evaporated. The residue is kept under 1 mmHg for 1.5 h at 40° C. to afford 7-(chloromethyl)-3-(4-methoxybenzyl)-3H-imidazo[4,5-b]pyridine x185 sufficiently pure for the next step.

1. temperatureThe reaction mixture is refluxed for 1 h
2. distillationThe volatiles are distilled off in the vacuum of a rotary evaporator
3. distillationThen 50 ml of chloroform is distilled off additionally from the residue
4. additionThe residual chloroform solution is added dropwise at 0° C. to a vigorously stirred saturated aqueous solution of NaHCO3
5. customThe organic phase is separated
6. dry with materialdried with anhydrous sodium sulfate
7. customevaporated