Sodium Hydroxide → 2-[6-(2-Chloro-4-methoxyphenoxy)-1-hexylthio]-benzimidazole

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Reaction Steps

Stir at room temperature for four days 2.5 gms. 2-mercapto-benzimidazole, 2 gms. of the iodide prepared in Examples 2 and 3, 25 ml. DMF and 0.71 gm. sodium hydroxide in a reaction flask. Remove the solvent and partition with water/methylene chloride. Elute on a silica column with 100% methylene chloride then 50/50 ethylacetate/methylene chloride to obtain the title compound. MS: m/z 391 (M+) H1 -NMR-200 mHz-δH (CDCl3), 1.5-1.6 (4H,m), 1.7-1.9 (4H,m), 3.35 (2H,t,J 7Hz), 3.75 (3H,s) 3.95 (2H,t,J 6Hz), 6.7-7.0 (3H,m), 7.2-7.4 (4H,m), 7.65-7.75 (1H,m).

Provenance & Evidence