Potassium Carbonate → 5-[3-(4-Methyl-pyridin-3-yl)-2-oxo-imidazolidin-1-yl]-indole-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

Using the same reaction conditions as in Example 14, 1-(4-methyl-pyridin-3-yl)-imidazolidin-2-one (I-14b: 250 mg, 1.412 mmol) was reacted with 5-bromo-indole-1-carboxylic acid tert-butyl ester (0.499 g, 1.691 mmol), 1,4-dioxane (15 mL), copper iodide (0.0080 g), trans-1,2-diamino cyclohexane (0.0241 g, 0.2110 mmol) and potassium carbonate (0.389 g, 2.818 mmol) to afford the crude product. Purification by column chromatography on silica gel (10% MeOH in CHCl3) afforded 125 mg of 5-[3-(4-Methyl-pyridin-3-yl)-2-oxo-imidazolidin-1-yl]-indole-1-carboxylic acid tert-butyl ester (24% yield).

Provenance & Evidence