2,6-Dibromotoluene → 1-(3-Bromo-2-methylphenyl)-3-m-tolylimidazolidin-2-one

Participants

Reaction Conditions

Reaction Steps

A suspension of 1,3-dibromo-2-methylbenzene (185 mg, 0.740 mmol), 1-m-tolylimidazolidin-2-one (50 mg, 0.284 mmol), copper (I) iodide (5.40 mg, 0.028 mmol), tripotassium phophosphate (120 mg, 0.567 mmol) and (+/−trans-1,2-diaminocyclohexane (3.4 μL, 0.028 mmol) in 1,4-dioxane (1 mL) was purged with nitrogen and heated at 120° C. in a sealed tube. After 21.5 h, the mixture was concentrated and the residue was purified by column chromatography (eluting with a gradient from hexane to 50:50 hexane-EtOAc) to provide 1-(3-bromo-2-methylphenyl)-3-m-tolylimidazolidin-2-one as a white solid (70 mg, 70%). 1H NMR (400 MHz, chloroform-d) δ 7.51-7.54 (1H, m), 7.49 (1H, s), 7.34 (1H, dd, J=8.05, 1.94 Hz), 7.24 (2H, d, J=8.05 Hz), 7.11 (1H, t, J=7.91 Hz), 6.90 (1H, d, J=7.49 Hz), 3.98-4.04 (2H, m), 3.81-3.87 (2H, m), 2.38 (3H, s), 2.36 (3H, s). Mass spectrum m/z 345, 347 (M+H)+.

Provenance & Evidence