Lithium Hexamethyldisilazide → 7-Isopropenyl-5-aminoindole

Participants

Reaction Conditions

Reaction Steps

To a solution of methyltriphenylphosponium bromide (3.8 g, 10 mmol) in 40 mL of THF was added 15 mL of a solution of lithium bis(trimethylsilyl)amide (15 mmol) and the resulting reaction mixture was stirred for 1 h at -78° C. A solution of 5-amino-7-acetylindole (0.55 g, 3.1 mmol) in 10 mL of THF was added into the solution slowly for 0.5 h period. The reaction mixture was slowly warmed to 25° C. and stirred for 12 h at the temperature. Column chromatographic separation of reaction mixture (50% EtOAc/n-Hexane) provided 0.45 g (2.6 mmol, 82%) of the desired product.

Provenance & Evidence