反应详情

To a solution of 2-(ethoxymethyl)-1-(2-hydroxy-2-methylpropyl)-4-(tritylamino)-1H-imidazo[4,5-c]quinoline-7-carboxylic acid (484 mg, 741 μmol) in DMF (5.19 mL) in an inert atmosphere was added TBTU (357 mg, 1.11 mmol), DIEA (388 μL, 2.22 mmol) and N,O-dimethylhydroxylamine hydrochloride (108 mg, 1.11 mmol) with stirring. The reaction mixture was stirred for 1 h at room temperature and afterwards the mixture was concentrated in vacuo. The residue was partitioned between ethyl acetate (40 mL, 2×20 mL) and water (40 mL). The organic phases were washed with water (2×20 mL), combined, dried over MgSO4, concentrated in vacuo and purified by flash chromatography (silica gel, 50% to 100% ethyl acetate in heptane) to give the title compound (0.53 g, quant.) as white foam; LC-MS (UV peak area, ESI) 92%, 644.4 (MH+).

1. stirringThe reaction mixture was stirred for 1 h at room temperature
2. concentrationafterwards the mixture was concentrated in vacuo
3. customThe residue was partitioned between ethyl acetate (40 mL, 2×20 mL) and water (40 mL)
4. washThe organic phases were washed with water (2×20 mL)
5. dry with materialdried over MgSO4
6. concentrationconcentrated in vacuo
7. custompurified by flash chromatography (silica gel, 50% to 100% ethyl acetate in heptane)