Potassium Iodide → 5-(1-Ethoxycarbonyl-1-methyl-ethoxy)-2-methyl-1H-indole-3-carboxylic Acid Benzyl Ester

Participants

Reaction Steps

2-Methyl-3-benzyloxycarbonyl-5-hydroxyindole (10.0 g, 35.54 mmol, 1.0 eq) was dissolved in acetonitrile (250 mL), followed by ethyl-2-bromo-isobutyrate (7.63 g, 39.10 mmol, 2.0 eq). Potassium carbonate (9.82 g, 71.08 mmol, 8.7 eq) was also added followed by potassium iodide (catalytic amount). The reaction mixture was refluxed for 24 hours. The reaction mixture was washed with brine and extracted with ethyl acetate (3×100 mL) and dried over sodium sulfate. The product was chromatographed in a hexane to hexane/ethyl acetate 7:3. 6.88 g of the product was obtained, 48% yield.

Provenance & Evidence