Sodium Bicarbonate → HCID 23152381, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of methyl 2-bromo-1-(2-tert-butoxycarbonylaminoethyl)-3-cyclohexyl-1H-indole-6-carboxylate (500 mg, 1.04 mmol), 2-formylphenylbononic acid (187 mg, 1.24 mmol) and sodium hydrogen carbonate (345 mg, 4.15 mmol) in 1,2-dimethoxyethane (5 ml) and water (2.5 ml) was added tetrakis(triphenylphosphine)palladium (60.0 mg, 0.05 mmol), and the mixture was stirred at 90° C. for 2 hr. Water was added to the reaction mixture and the mixture was extracted with ethyl acetate. The organic layer was successively washed with water and saturated brine and dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (hexane:ethyl acetate=5:1-3:1) to give methyl 1-(2-tert-butoxycarbonylaminoethyl)-3-cyclohexyl-2-(2-formylphenyl)-1H-indole-6-carboxylate (450 mg, yield 85%).

Provenance & Evidence