Sodium hydride → isopropyl N-(4-pyridylmethyl)-2-bromo-4-methyl-5-imidazole carboxylate

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To a suspension of 195 milligrams (mg) (8.13 mM) of sodium hydride in 20 ml of anhydrous tetrahydrofuran was added, in portions, 2 g (8.13 mM) of isopropyl 2-bromo-4-methyl-5-imidazolecarboxylate. The resulting suspension was cooled to 0° C. and 1.03 g (8.13 mM) of 4-chloromethylpyridine was added. The reaction mixture was stirred overnight at 50° C. The precipitated sodium chloride was removed by filtration and concentration in vacuo of the filtrate gave 2.5 g (92%) of isopropyl N-(4-pyridylmethyl)-2-bromo-4-methyl-5-imidazole carboxylate as a tan solid.

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