反应详情

To a solution of 1H-indole-3-carboxylic acid (5 g, 31 mmol) in DMF (70 mL) under a nitrogen atmosphere at 0° C. was added cesium carbonate (11 g, 31 mmol) and benzyl bromide (4.05 mL, 34.1 mmol). The reaction mixture was stirred at RT for 48 h and poured into water. EtOAc was added and the layers were separated and the aqueous layer was extracted with EtOAc (×3). The combined organic layers were washed with water, dried over Na2SO4, filtered and concentrated. The residue was taken up in Et2O and the resulting precipitate was filtered-off to give the title compound. TLC, Rf (c-hexane/EtOAc 1:1)=0.55; MS (LC-MS): 252.1 [M+H]+, 274.0 [M+Na]+, 525.1 [2M+Na]+, 250.1 [M−H]−; tR (HPLC conditions a) 3.77 min.

1. customthe layers were separated
2. extractionthe aqueous layer was extracted with EtOAc (×3)
3. washThe combined organic layers were washed with water
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated