Ethanolamine → Ethanol, 2-((2,4-dinitrophenyl)amino)-

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A mixture of 3.0 g of 2,4-dinitrofluorobenzene (16.12 mmol, 1 eq) and 1.17 ml ethanolamine (19.34 mmol, 1.2 eq) in acetonitrile (30 ml) with 3.56 g of K2CO3 (25.79 mmol, 1.6 eq) was heated at 65° C. overnight. The reaction mixture became red. The solvent was removed under reduced pressure. The residue was diluted in 1N Na2CO3 and extracted with ethyl acetate (5×50 ml). The combined organic layer was washed with saturated NaCl (3×20 ml), dried over MgSO4 and concentrated under reduced pressure. To this orange solution was added ethanol (20 ml) and the mixture was heated at 80° C. until dissolution was complete. Distilled water (20 ml) was added and the solution was cooled to room temperature over a period of 1 hour. The yellow solid which crystallized was collected by filtration, washed with 30/70:ethanol/water and then distilled water (2×30 ml). The solid was dried by lyophilization.

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