反应详情

To a solution of 2-isopropyl-6-methoxy-1-(pyridin-2-ylmethyl)-1H-indole-3-carboxylic acid (Compound 139, 415 mg, 1.28 mmol) in CH2Cl2 (20 ml) at 0° C. was added (COCl)2 (2 M in CH2Cl2, 1.6 ml, 3.20 mmol) and a catalytic amount of DMF. The mixture was stirred at room temperature for 1 h, and was concentrated in vacuo. The residue was dissolved in CH2Cl2 (20 ml), cooled to 0° C., and 3,4-difluorobenzylamine (0.23 ml, 1.92 mmol) was added, followed by Et3N (0.53 ml, 3.84 mmol). The reaction was stirred at room temperature for 4 h, diluted with EtOAc, washed with H2O, brine, dried over Na2SO4, and concentrated in vacuo. The residue was purified by chromatography on silica gel (0→100% EtOAc-hexanes) to yield the title compound as a yellow solid.

1. concentrationwas concentrated in vacuo
2. dissolutionThe residue was dissolved in CH2Cl2 (20 ml)
3. temperaturecooled to 0° C.
4. stirringThe reaction was stirred at room temperature for 4 h
5. washwashed with H2O, brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated in vacuo
8. customThe residue was purified by chromatography on silica gel (0→100% EtOAc-hexanes)