Ammonia → HCID 89807072, compound

Participants

Reaction Steps

To a solution of ii (3.0 g, 11.62 mmol) in acetic acid (50 mL) was added ammonium thiocynate (4.18 g, 55.11 mmol) at RT. The resulting mixture was stirred at RT for 15 min followed by the addition of bromine (0.68 mL, 13.22 mmol) in acetic acid (5 mL). The mixture was stirred at RT for 5 h. The pH was adjusted to >7 with ammonia solution followed by extraction with EtOAc (2×200 mL). The combined organics were washed with H2O, brine solution, dried (Na2SO4) and concentrated in vacuo. The residue was purified over silica (60% EtOAc-Hexanes) to obtain iii (1.0 g, 26%). 1HNMR (DMSO-d6, 400 MHz): δ 7.50 (s, 1H), 7.49 (s, 1H), 7.43 (br s, 2H), 4.18 (m, 1H), 3.96 (m, 2H), 3.80 (m, 1H), 3.69 (m, 1H), 1.96 (m, 2H) and 1.78 (m, 2H). MS: 329.0 [M+H]+.

Provenance & Evidence