Hydrochloric Acid → 5-nitro-N-phenyl-1H-indole-2-carboxamide

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Reaction Steps

5.44 g (26.39 mmol) of 5-nitro-1H-indole-2-carboxylic acid from Example XLVII, 7.59 g (39.58 mmol) of N′-(3-dimethylaminopropyl)-N-ethylcarbodiimide×HCl and 1.61 g (13.19 mmol) of 4-dimethylaminopyridine are initially charged in 400 ml of a 10:1 dichloromethane:DMF mixture. 2.95 g (2.89 ml, 31.67 mmol) of aniline are added, and the mixture is stirred at RT overnight. For work-up, the mixture is diluted and extracted with aqueous hydrochloric acid and dichloromethane. The organic phase is washed with sat. sodium chloride solution, dried with sodium sulphate, filtered and dried under reduced pressure.

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