反应详情

温度

90 °C

To a stirred solution of 1-(5-chloro-2-nitro-phenyl)-2,5-dimethyl-1H-pyrrole (73 mg, 0.29 mmol, as prepared in the previous step) in DMF (2 mL) was added piperazine-1-carboxylic acid tert-butyl ester (542 mg, 2.9 mmol) and the result was heated to 90° C. for 18 h. The reaction a diluted with EtOAc (50 mL), washed with H2O (2×25 mL), dried (Na2SO4) and concentrated in vacuo. The residue was chromtographed on a SPE column (5 g, SiO2) to afford 35 mg (30%) of the title compound as a brown solid. 1H-NMR (CDCl3; 400 MHz): δ 8.13 (d, 1H, J=9.3 Hz), 6.91-6.88 (m, 1H), 6.66 (s, 1H), 5.93 (s, 2H), 3.63-3.60 (m, 4H), 3.42-3.40 (m, 4H), 1.97 (s, 6H), 1.48 (s, 9H).

1. customThe reaction
2. washwashed with H2O (2×25 mL)
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated in vacuo