HCID 351251, compound → 4-(3-Pyridinylsulfonyl)benzenamine

Participants

Reaction Steps

A stirred solution of 4-nitrophenyl 3-pyridyl sulfone (1.60 g, 6.1 mmol) and stannous chloride dihydrate (6.83 g, 30.2 mmol) in absolute ethanol (20 mL) was heated at reflux for 45 min. The reaction mixture was poured into ice water, and the aqueous solution basified with sodium bicarbonate (pH=8-9) and extracted with ethyl acetate (2×200 mL). The organics were combined, dried (MgSO4), filtered, and the solvent distilled to yield the title benzenamine (1.10 g, 79%) as a pale yellow solid; mp 182°-184° C. 1H-NMR (300 MHz, d6 -DMSO): 6.29 (broad s, 2H, NH2), 6.64 (d, 2H, J=11.2 Hz, aromatic), 7.58 (m, 1H, aromatic), 7.61 (d, 2H, J=11.1 Hz, aromatic), 8.21 (dd, 1H, J=9.8, 2.4 Hz, aromatic), 8.78 (dd, 1H, J=9.9, 1.4 Hz, aromatic), 9.01 (d, 1H, J=2.4 Hz). MS (CI, CH4): 235(M+1).

Provenance & Evidence