反应详情

Under argon, 4 g (14.17 mmol) of 8-(benzyloxy)-2-methylimidazo[1,2-a]pyridine-3-carboxylic acid, 1.83 g (15.59 mmol) of (R)-(−)-2-aminohexanol and 7.166 g (70.85 mmol) of 4-methylmorpholine were suspended in 28 ml of dichloromethane. 5 g (15.59 mmol) of TBTU were then added, and the mixture was stirred at room temperature overnight. After 16 h, the mixture was diluted with 200 ml of dichloromethane and washed with 10% strength aqueous citric acid solution, with water and with saturated aqueous sodium chloride solution. The organic phase was concentrated and the residue obtained was purified on a silica gel cartridge (mobile phase dichloromethane:methanol=100:3). Concentration of the product fractions thus gave 3.83 g (71% of theory) of 8-(benzyloxy)-N-[(2R)-1-hydroxyhexan-2-yl]-2-methylimidazo[1,2-a]pyridine-3-carboxamide.

1. waitAfter 16 h
2. washwashed with 10% strength aqueous citric acid solution, with water and with saturated aqueous sodium chloride solution
3. concentrationThe organic phase was concentrated
4. customthe residue obtained
5. customwas purified on a silica gel cartridge (mobile phase dichloromethane:methanol=100:3)