反应详情

[3-(4-methoxybenzyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridin-7-yl]methanol x199 (0.55 g, 1.63 mmol) is dissolved in dichloromethane (20 ml). SOCl2 (2 ml) is added dropwise. The reaction mixture is refluxed for 1 h. The volatiles are rotary-evaporated. Then 50 ml of chloroform is additionally distilled off from the residue. The resulting chloroform solution is added dropwise at 0° C. under vigorous stirring to saturated aqueous NaHCO3. The organic phase is separated, dried with anhydrous sodium sulfate, evaporated, and dried under 1 mmHg for 1.5 h at 40° C. 7-(chloromethyl)-3-(4-methoxybenzyl)-5-(trifluoromethyl)-3H-imidazo[4,5-b]pyridine x202 (0.55 g, 95%) sufficiently pure for the next step is obtained.

1. temperatureThe reaction mixture is refluxed for 1 h
2. customThe volatiles are rotary-evaporated
3. distillationThen 50 ml of chloroform is additionally distilled off from the residue
4. additionThe resulting chloroform solution is added dropwise at 0° C.
5. customThe organic phase is separated
6. dry with materialdried with anhydrous sodium sulfate
7. customevaporated
8. customdried under 1 mmHg for 1.5 h at 40° C