Dimethylformamide → Methyl 3-[(7-amino-2,3-dihydro-4H-1,4-benzoxazin-4-yl)methyl]benzoate

Participants

Reaction Conditions

Reaction Steps

DMF (5 mL), water (5 mL), zinc (0.7 g, 10.7 mmol) and iron trichloride hexahydrate (0.12 g, 0.4 mmol) were added to methyl 3-[(7-nitro-2,3-dihydro-4H-1,4-benzoxazin-4-yl)methyl]benzoate obtained in Example (100a) (0.35 g, 1.07 mmol), and the mixture was stirred at 100° C. for 50 minutes. The insoluble matter was filtered off and ethyl acetate was added to the mother liquor, and the organic layer was washed with water and brine, and dried over anhydrous magnesium sulfate. Concentration under reduced pressure gave 0.28 g of the crude title compound as a brown oily substance (88%).

Provenance & Evidence