Morpholine → 3-Methoxy-5-morpholin-4-yl-2-nitro-phenol

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 5-fluoro-3-methoxy-2-nitro-phenol (2.0 g, 10.6 mmol) in dimethylsulfoxide (25 ml) is added morpholine (9.2 ml, 106 mmol) at room temperature. The resulting mixture is heated at 100° C. for 2 h. After completion of reaction (monitored by TLC), the mixture is diluted with water (40 ml) and the aqueous layer is extracted with ethyl acetate (3×30 ml). The combined organic layers are washed with water (30 ml), brine (20 ml), dried over sodium sulfate and concentrated in vacuo. The crude product is purified by flash column chromatography (45% ethyl acetate/hexane) to yield 3-methoxy-5-morpholin-4-yl-2-nitro-phenol (0.71 g, 2.78 mmol, 26%).

Provenance & Evidence