Potassium Carbonate → 1-(4-Methyl-pyridin-3-yl)-3-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazol-5-yl]-imidazolidin-2-one

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Reaction Steps

Using the same reaction conditions as in Example 14, 1-(4-methyl-pyridin-3-yl)-imidazolidin-2-one (I-14b: 0.095 g, 0.00058 mol) was reacted with 5-bromo-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazole (0.170 g, 0.00058 mmol), 1,4-dioxane (10 mL), copper iodide (0.011 g, 0.000051 mol), trans-1,2-diamino cyclohexane (0.018 g, 0.00016 mol) and potassium carbonate (0.134 g, 0.00106 mmol) to afford the crude product. Purification by column chromatography on silica gel (1% MeOH in chloroform) afforded 0.24 g of 1-(4-Methyl-pyridin-3-yl)-3-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazol-5-yl]-imidazolidin-2-one (97.5% yield).

Provenance & Evidence