反应详情

To a DMF (0.47 M) solution of 6-bromo-1H-indole (1 eq.) was added at 0° C. phosphorus oxychloride (1.2 eq.). The resulting solution was warmed to RT and stirred at RT for 16 h. The resulting solution was re-cooled to 0° C. and then carefully added NaOH (2 M aq. solution, 2.8 eq.). After stirring at RT for another 2 h, the crude reaction mixture was diluted with water and extracted with EtOAc. The combined organic extracts were dried over MgSO4. Filtration and concentration of the filtrate in vacuo afforded a yellow oil. Purification of the crude product thus obtained by way of flash chromatography (SiO2, Hex→EtOAc) afforded the title compound as a brown solid.

1. temperatureThe resulting solution was re-cooled to 0° C.
2. stirringAfter stirring at RT for another 2 h
3. customthe crude reaction mixture
4. extractionextracted with EtOAc
5. dry with materialThe combined organic extracts were dried over MgSO4
6. filtrationFiltration and concentration of the filtrate in vacuo
7. customafforded a yellow oil
8. customPurification of the crude product
9. customthus obtained by way of flash chromatography (SiO2, Hex→EtOAc)