Methyl iodide → 1-Cyclobutyl-3-methyl-2-oxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester

Participants

Reaction Steps

To a solution of 1-cyclobutyl-2-oxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester (17.01 g, 69.1 mmol) in methyl sulfoxide (60 ml) was added sodium hydride (2.76 g as a 60% dispersion in oil, 69 mmol). The reaction mixture was stirred for 30 minutes prior to the dropwise addition of iodomethane (4.3 ml, 69.1 mmol). The reaction was stirred for 1 hour, was diluted with water and extracted with ethyl acetate. The organic layer was dried with sodium sulfate and concentrated in vacuo to give 17.76 g of 1-Cyclobutyl-3-methyl-2-oxo-2,3-dihydro-1H-benzoimidazole-5-carboxylic acid methyl ester.

Provenance & Evidence