Methyl vinyl sulfone → 1-[3-(Ethyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperazine

Participants

Reaction Conditions

Reaction Steps

To 1-[3-(ethyloxy)-4-nitrophenyl]piperazine (0.5 g, 1.99 mmol) in 10 mL of dioxane was added, methyl vinyl sulfone (0.53 g, 4.97 mmol). The mixture was heated to 120° C. for 2 h. The solvent was rotovaped down and the crude product was purified by flash chromatography to give the title compound of step B (0.565 g, 1.58 mmol, 79%). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.83 (d, J=9.34 Hz, 1H), 6.57 (dd, J=9.43, 2.47 Hz, 1H), 6.51 (d, J=2.38 Hz, 1H), 4.16 (q, J=6.96 Hz, 2H), 3.36-3.41 (m, 4H), 3.30-3.34 (m, 2H), 3.01 (s, 3H), 2.73 (t, J=6.87 Hz, 2H), 2.49-2.55 (m, 4H), 1.32 (t, J=6.96 Hz, 3H).

Provenance & Evidence