反应详情

温度

110 °C

palladium(II) acetate (0.390 g, 1.74 mmol), BINAP (0.865 g, 1.39 mmol) and CS2CO3 (5.66 g, 17.36 mmol) were added to a mixture of 4-bromo-1-methyl-2-nitrobenzene (3 g, 13.89 mmol) and piperazine (9.74 g, 113.04 mmol) in microwave. The suspension were heated to 110 °C for 24 hours, LCMS showed product mass [M+1]: 222.0 at retension time RT=1.38 min (polar short purity method). Workup reaction by additional of water (10mL), extracted with EtOAc (3x20 mL), washed with brine, dried with Na2SO4, evaporated off solvent to give a residue, which was purified by isco chromatographer, eluting with 0-10% MeOH in DCM to give 1-(4-methyl-3-nitrophenyl)piperazine (1.670 g, 54.4 %) as a yellow solid. LCMS confirmed the target compound.