Morpholine → HCID 57677628, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(3-methyl-4-nitrophenoxy)pyridin-2-ylamine (553 mg, 2.26 mmol) in tetrahydrofuran (20 ml) was added triethylamine (0.471 ml, 3.38 mmol) under a nitrogen atmosphere. Phenyl chloroformate (0.424 ml, 3.38 mmol) was added thereto while ice-cooling, followed by stirring for 20 min. The reaction mixture was concentrated under a reduced pressure to give a residue, to which N,N-dimethylformamide (8.0 ml) and morpholine (0.786 ml, 9.02 mmol) was added, followed by stirring at room temperature for 11 hrs. The reaction mixture was partitioned between ethyl acetate (60 ml) and water (60 ml). The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated under a reduced pressure. The resultant residue was dissolved in ethanol (20 ml), and then electrolytic iron powder (505 mg, 9.04 mmol), ammonium chloride (967 ml, 18.1 mmol) and water (5 ml) were added thereto, followed by stirring to heat at 80° C. for 2 hrs. The reaction mixture was cooled down to room temperature, and filtered to remove an insoluble portion. The filtrate was concentrated under a reduced pressure to give a residue, which was then purified by silica gel column chromatography (eluent; hexane/ethyl acetate=1/1, ethyl acetate, then ethyl acetate/methanol=10/1) to provide the titled compound (283 mg, 38.1%) as a brown oil.

Provenance & Evidence