Potassium Carbonate → 4-Nitro-1-(pyridin-4-yl)methyl-1H-benzimidazole

Participants

Reaction Steps

A 500-mL round-bottomed flask equipped with a magnetic stirrer and nitrogen inlet is charged with compound 3b (3.30 g, 30.6 mmol), potassium carbonate (8.95 g, 64.8 mmol), anhydrous DMF (200 mL) and 4-chloromethylpyridine hydrochloride (3.98 g, 24.3 mmol) and the mixture is then stirred under nitrogen for 24 h at ambient temperature. After such time the reaction is partitioned between water (200 mL) and ethyl acetate (200 mL). The aqueous layer is separated and extracted with ethyl acetate (6×250 mL). The combined organic extracts are dried with sodium sulfate, and the drying agent is filtered off. The filtrate is then concentrated under vacuum to give a brown solid, which is purified by column chromatography to afford compound 3c as a yellow solid.

Provenance & Evidence