反应详情

Sodium hydride (22 mg, 0.54 mmol, 60% dispersion in oil) was added to an ice-cooled stirred solution of methyl 2-(3-(trifluoromethyl)phenyl)-7-(trifluoromethylsulfonyloxy)-5H-pyrido[3,2-b]indole-4-carboxylate (200 mg, 0.386 mmol) in DMF (4 ml). This was left stirring until gas evolution stopped. 1-(bromomethyl)-4-methoxybenzene (0.072 ml, 0.502 mmol) was added and the reaction was kept in the ice bath for 2 hr. After an additional 1 hr at RT, the reaction was quenched with a saturated aqueous solution of NH4Cl solution and extracted with EtOAc. The organic extracts were washed with water (5×), brine, and dried with sodium sulfate. Removal of the solvent, followed by radial chromatography (step gradient elution with hexane containing 0 to 5% DCM) afforded methyl 5-(4-methoxybenzyl)-2-(3-(trifluoromethyl)phenyl)-7-(trifluoromethylsulfonyloxy)-5H-pyrido[3,2-b]indole-4-carboxylate (91 mg, 0.14 mmol, 37% yield). MS (ESI) m/z 639.1 (M+H). 1H NMR (500 MHz, chloroform-d) δ ppm 8.55 (1H, d, J=8.55 Hz), 8.42 (1H, s), 8.33 (1H, d, J=7.63 Hz), 8.08 (1H, s), 7.59-7.71 (2H, m), 7.40 (1H, d, J=2.14 Hz), 7.29 (1H, dd, J=8.55, 2.14 Hz), 6.88 (2H, d, J=8.85 Hz), 6.76 (2H, d, J=8.85 Hz), 5.71 (2H, s), 3.86 (3H, s), 3.73 (3H, s).

1. temperaturecooled
2. waitThis was left
3. customthe reaction was quenched with a saturated aqueous solution of NH4Cl solution
4. extractionextracted with EtOAc
5. washThe organic extracts were washed with water (5×), brine
6. dry with materialdried with sodium sulfate
7. customRemoval of the solvent
8. washfollowed by radial chromatography (step gradient elution with hexane containing 0 to 5% DCM)