Pyrrolidine → 5-(3-oxo-3-pyrrolidin-1-yl-propyl)-1H-indole-2-carboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 5-(2-carboxy-ethyl)-1H-indole-2-carboxylic acid ethyl ester (1.3 g, 5 mmol) in 10 mL of dimethylformamide, was added 1,1′-carbonyldiimidazole (973 mg, 6 mmol). The mixture was stirred under nitrogen at room temperature for 30 mins. To the reaction mixture was added pyrrolidine (1.3 mL, 15 mmol) dropwise. After stirring at room temperature for overnight, the reaction was diluted with dichloromethane (300 mL), washed with 1N hydrochloric acid, saturated sodium bicarbonate solution, brine, dried and concentrated to give 1.5 g (95%) of 5-(3-oxo-3-pyrrolidin-1-yl-propyl)-1H-indole-2-carboxylic acid ethyl ester.

Provenance & Evidence