Morpholine → 5-(2-morpholin-4-yl-2-oxo-ethoxy)-1H-indole-2-carboxylic acid ethyl ester

Participants

Reaction Steps

A mixture of 5-carboxymethoxy-1H-indole-2-carboxylic acid ethyl ester (1.5 g, 5.7 mmol) and 1-1′-carbonyldiimidazole (1.11 g, 6.85 mmol) in dimethylformamide (15 mL) was stirred at room temperature for 30 mins. To the mixture was then added morpholine (1 mL) and the stirring was continued for overnight. The reaction was concentrated and the residue was dissolved in dichloromethane (200 mL), washed with 1N hydrochloric acid, saturated sodium bicarbonate and brine, dried and concentrated to give 1.6 g (85%) of 5-(2-morpholin-4-yl-2-oxo-ethoxy)-1H-indole-2-carboxylic acid ethyl ester.

Provenance & Evidence