Sodium Sulfite → HCID 59409002, compound

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Reaction Steps

A solution of 1,2,5,6-tetrahydro-4H-pyrrolo[3,2,1-ij]quinoline (4.0 g, 25.2 mmol) in N,N-dimethylformamide (160 ml) cooled to −30° C. was treated with a solution of N-bromosuccinimide (4.5 g, 25.3 mmol) in N,N-dimethylformamide (30 ml) dropwise over 5 minutes. The mixture was stirred for a further 15 minutes then treated with 10% aqueous sodium sulfite (100 ml) then diluted with water (500 ml) and ethyl acetate (300 ml). The aqueous layer was removed and the organic layer was washed with saturated aqueous sodium bicarbonate (100 ml), then water (3×150 ml). The organic layer was dried with anhydrous sodium sulfate and evaporated to dryness to give 8-bromo-1,2,5,6-tetrahydro-4H-pyrrolo[3,2,1-ij]quinoline as a pale brown oil (5.2 g) which was used without further purification. 400 MHz 1H NMR (CDCl3) δ: 7.02 (m, 1H), 6.94 (m, 1H), 3.25 (t, 2H), 2.95 (m, 2H), 2.89 (t, 2H), 2.65 (t, 2H), 2.06 (m, 2H); LCMS: 238 and 240 [M+H].

Provenance & Evidence