右美托咪定杂质51

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 8-amino-6-bromo-2,3-dimethylimidazo[1,2-a]pyridine (1.2 g, 5.0 mmol), 2,6-dimethylbenzylchloride (0.772 g, 5.0 mmol), sodium carbonate (0.8 g), sodium iodide (0.2 g) and acetone (45 ml) was stirred overnight. More 2,3-dimethylbenzylchloride (0.285 g) was added and the reaction mixture was refluxed for 5 h. After addition of acetone the reaction mixture was filtered. The solvent was removed in vacuo and the residue was dissolved in CH2Cl2, washed with NaHCO3, dried over Na2SO4 and evaporated. The crude product dissolved in ethyl acetate and petroleum ether was added. Filtration and evaporation of the solvent gave a residue which was recrystallized from ethyl acetate to give 1.45 g of the title compound. the reaction mixture was refluxed for 5 h was filtered The solvent was removed in vacuo the residue was dissolved in CH2Cl2 washed with NaHCO3 dried over Na2SO4 evaporated The crude product dissolved in ethyl acetate petroleum ether was added Filtration and evaporation of the solvent gave a residue which was recrystallized from ethyl acetate