Hexane → 7-chloro-1-methyl-2-(4-(trimethylsilyl)but-3-ynyl)-1H-benzo[d]imidazole

Participants

Reaction Steps

To a solution of the trimethyl(prop-1-ynyl)silane (0.21 mL, 1.4 mmol) in THF (4 mL), was added at −78° C. nBuLi 2.5M in hexane (0.56 mL, 1.3 mmol). After 90 min at −78° C., a solution of 7-chloro-2-(chloromethyl)-1-methyl-1H-benzo[d]imidazole (250 mg, 1.2 mmol) in THF (2 mL) was added. Mixture went from purple to orange and then dark brown. The reaction was quenched after 1 h at −78° C. with water and the solvent was evaporated to dryness to afford 338 mg of 7-chloro-1-methyl-2-(4-(trimethylsilyl)but-3-ynyl)-1H-benzo[d]imidazole (Yield: 100%) as a brown oily solid. It was carried through to the next step without purification.

Provenance & Evidence