Triethylamine → N-(3,4-diaminophenyl)-2-(diethylamino)acetamide

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Reaction Steps

2-Nitrobenzene-1,4-diamine (1.55 g, 10.1 mmol), N,N-diethylglycine sodium salt (1.61 g, 10.6 mmol) and DEPBT (3.02 g, 10.0 mmol) were suspended in acetonitrile (75 mL). Triethylamine (2.8 mL, 20.0 mmol) was added and the solution stirred overnight at room temperature. The brown precipitate which was formed was filtered and discarded. The filtrate was concentrated and the residue partitioned between EA and saturated aqueous sodium bicarbonate. The organic phase was washed with water and then with brine, dried over sodium sulfate, and the solvent removed under reduced pressure. The residue was dissolved in ethanol (50 mL) and hydrogenated at atmospheric pressure with 10% palladium on charcoal (1.0 g, 0.9 mmol) at room temperature overnight. Filtration and concentration under reduced pressure gave N-(3,4-diaminophenyl)-2-(diethylamino)acetamide as a light brown semi-solid, which solidified and turned blue on standing.

Provenance & Evidence