2-(Methylthio)benzimidazole → 1-{[2-(methylthio)-1H-benzimidazol-1-yl]methyl}-4-propylpyrrolidin-2-one

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Reaction Steps

A solution of (2-oxo-4-propylpyrrolidin-1-yl)methyl diethylcarbamate a26 (1 eq, 3.18 mmol, 0.5 g) and 2-(methylthio)-benzimidazole (1.25 eq, 3.90 mmol, 0.64 g) in acetonitrile (4 ml) was heated under reflux for 42 h. The solvent was evaporated under reduce pressure and purification by preparative chromatography on reverse phase afforded 390 mg of 1-{[2-(methylthio)-1H-benzimidazol-1-yl]methyl}-4-propylpyrrolidin-2-one 90 (HPLC purity (U.V.): 85%; Yield: 40.3%).

Provenance & Evidence