Sodium hydride → HCID 21714319, compound

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Reaction Steps

A mixture of ethyl 7-(2-methanesulfonyloxyethoxy)-4-methyl-1H-indole-2-carboxylate (1.30 g, 3.81 mmol), 60% sodium hydride (0.15 g, 3.81 mmol) and N,N-dimethylformamide (65 ml) was stirred at room temperature for 8 hours. The reaction mixture was poured into ice water and extracted three times with ethyl acetate, and the extract solution was washed with a 5% aqueous sodium chloride solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was purified by a silica gel column chromatography (eluent: ethyl acetate/n-hexane= 2/98) to obtain ethyl 2,3-dihydro-7-methyl-pyrrolo [1,2,3-de]-1,4-benzoxazine-5-carboxylate (0.87 g).

Provenance & Evidence