反应详情

温度

-40 °C

To a solution of 1-bromo-2,4-dimethyl-5-nitro-benzene (7.5 g, 32.6 mmol) in THF (100 mL) at −78° C. was added vinylmagnesium bromide (110 mL of 1.0 M solution in THF, 1.1 mol) dropwise. The reaction was allowed to warm slowly to −40° C. then stirred for 4 h. Water was added, and the reaction mixture allowed to warm slowly to rt and extracted with EtOAc. The organic phase was then dried over Na2SO4 and concentrated to give 4-bromo-5,7-dimethylindole (2.3 g) which was used in the subsequent step without purification.

1. temperatureto warm slowly to rt
2. extractionextracted with EtOAc
3. dry with materialThe organic phase was then dried over Na2SO4
4. concentrationconcentrated