反应详情

To a suspension of NaH (0.6 g, 2 eq.) in DMF (7 mL) was added a solution of 6-methoxy-2-methyl-1H-indole-3-carbonitrile (1.3 g, 7.0 mmol) in DMF (8 mL) followed by ethyl iodide (1.2 mL, 2 eq.) at 0° C. After stirring for 1 h, the mixture was poured into ice water and the extracted with CH2Cl2. The organic layer was washed with brine and dried with Na2SO4. The solvent was evaporated under vacuum and purified with flash column chromatography on silica gel using EtOAc/petroleum ether (1/5) as eluent to yield 92% of 1-ethyl-6-methoxy-2-methyl-1H-indole-3-carbonitrile.

1. extractionthe extracted with CH2Cl2
2. washThe organic layer was washed with brine
3. dry with materialdried with Na2SO4
4. customThe solvent was evaporated under vacuum
5. custompurified with flash column chromatography on silica gel