Iodine → HCID 21106352, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of silver sulfate (100 g, 0.32 mol) and iodine (82 g, 0.32 mol) in N,N-dimethylformamide (700 mL) and ethanol (1400 mL) was treated with 5-nitro-2,3-dihydro-1H-indole I (48 g, 0.29 mol). The resulting mixture was stirred at 25° C. for 1.5 h, filtered and the filter pad washed with ethyl acetate. The filtrate was concentrated in vacuo to a volume of approximately 500 mL. This solution was treated with a 1.0 N aqueous sodium thiosulfate solution (100 mL) and a saturated aqueous sodium chloride solution (400 mL). The resulting precipitate was collected by filtration, washed with water and petroleum ether, and dried in vacuo to afford 7-iodo-5-nitro-2,3-dihydro-1H-indole II (83.9 g, 98.9%) as a white solid: 1H NMR (DMSO-d6, 300 MHz) δ 8.18 (d, J=2.20 Hz, 1H), 7.80 (d, J=1.46 Hz, 1H), 7.03 (broad s, 1H), 3.65 (t, J=8.97 Hz, 2H), 3.17 (t, J=8.60 Hz, 2H).

Provenance & Evidence