7-Fluoro-5-nitro-2,3-dihydrobenzo[b][1,4]dioxine → 7-Fluoro-2,3-dihydro-1,4-benzodioxin-5-amine

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Reaction Steps

10% Pd/C (400 mg) was added to a solution of 7-fluoro-5-nitro-2,3-dihydrobenzo[b][1,4]dioxine (2.0 g, 10 mmol) in methanol (50 mL) and stirring was continued at 25° C. under H2 atmosphere for 3 h. The reaction mixture was filtered over celite bed and washed with methanol. The filtrate and the washings were concentrated under reduced pressure to afford 7-fluoro-2,3-dihydrobenzo[b][1,4]dioxin-5-amine (Int-27) (1.6 g, 94% yield) as pale brown liquid. MS (ESI): m/z 170.1 (M+H).

Provenance & Evidence