2-Bromopropane → HCID 22477357, compound

Participants

Reaction Conditions

Reaction Steps

Potassium carbonate (70 mg) was added to a solution of 2-(6-hydroxy-5-methoxy-1-methyl-1H-indol-3-yl)-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine [112 mg, Reference Example 83] in dry dimethylformamide (5 mL) under an argon atmosphere at ambient temperature. The mixture was allowed to stir for 10 minutes then treated with 2-bromopropane (66 μl) and heated at 70° C. for 3 hours. Additional portions of potassium carbonate (70 mg) and 2-bromopropane (66 μl) were then added and the mixture was stirred and heated at 70° C. for 4 hours. The cooled reaction mixture was poured in water (20 mL) and extracted three times with ethyl acetate (40 mL). The combined organic phases were washed with brine (20 mL), then dried over magnesium sulfate and then evaporated. The brown residue was subjected to flash column chromatography on silica eluting with a mixture of cyclohexane and ethyl acetate (3:2, v/v) to give the title compound (56 mg) as an off-white foam. TLC: RF=0.47 (cyclohexane/ethyl acetate, 1/1). MS: CI (NH3); m/z=490 MH+.

Provenance & Evidence