1H-Benzimidazole, 1-methyl- → N-Methyl-N'-2-pyridylbenzimidazolium iodide

Participants

Reaction Steps

A mixture of 2-iodopyridine (2.0 g, 9.8 mmol) and 1-methylbenzimidazole (1.29 g, 9.8 mmol) was kept neat at 140° C. for 72 h. After cooling to ca 50° C., acetone was added and the resulting solid was filtered and washed with acetone and ether. Yield: 826 mg (25%). 1H NMR (DMSO-d6): δ 10.48 (s, 1H, NCHN), 8.79 (d, 1H), 8.47-8.49 (m, 1H), 8.27-8.32 (dt, 1H), 8.14-8.16 (m, 1H), 8.04 (d, 1H), 7.77-7.82 (m, 2H), 7.71-7.74 (dd, 1H), 4.20 (s, 3H, CH3). This ligand was pure by 1H-NMR and was used without further purification.

Provenance & Evidence