Imidazole → HCID 68156808, compound

Participants

Reaction Steps

Iodine (3980 mg, 15.7 mmol) was added to the orange solution of (E)-4-((2-(hydroxymethyl)phenyl)diazenyl)-3,5-dimethyphenol (2680 mg, 10.46 mmol), triphenylphosphine (4110 mg, 15.7 mmol) and imidazole (2140 mg, 31.4 mmol) in tetrahydrofuran (30 mL) at room temperature. The mixture was stirred for 40 minutes. The solvent was evaporated. The crude was dissolved in EtOAc/MeOH and loaded to the column and purified by ISCO (40 g silica gel, EtOAc/heptane: 0→50%), leading to the desired product as a white/pale yellow solid. 1H NMR (400 MHz, CDCl3) δ ppm 1.85 (s, 6H) 6.49 (s, 2H) 7.07-7.21 (m, 1H) 7.32-7.42 (m, 1H) 7.75 (d, J=8.58 Hz, 1H) 7.80 (dd, J=8.78, 0.98 Hz, 1H) 7.96 (d, J=0.78 Hz, 1H) 7.99 (s, 1H). LCMS: m/z=239.2 [M+H].

Provenance & Evidence