Ammonium Chloride → 3-(7-Methyl-1H-indol-3-yl)-4-[5-(4-methyl-piperazin-1-yl)-pyridin-3-yl]-pyrrole-2,5-dione

Participants

Reaction Steps

2-[5-(4-Methyl-piperazin-1-yl)-pyridin-3-yl]-acetamide (150 mg, 0.64 mmol) and (7-methyl-1H-indol-3-yl)-oxo-acetic acid methyl ester (209 mg, 0.96 mmol) are dissolved under an atmosphere of argon in a mixture of dry DMF (2 ml) and dry THF (2 ml). A solution of 1.0 M KOtBu in THF (1.9 ml, 1.9 mmol) is then added at RT. After 1 h at 50° C., TLC analysis indicated complete conversion of starting materials. The reaction mixture is diluted with EtOAc and poured into a saturated aqueous NH4Cl solution. The organic layer is separated, washed with brine, dried over Na2SO4, and the organic solvent is evaporated. The residue is purified by FCC (EtOAc/AcOH/H2O 600:115:150) to afford the title compound. 1H NMR (d6-DMSO 400 MHz): δ 2.15 (s, 3H), 2.28-2.32 (m, 2H), 2.92-3.00 (m, 2H), 3.15 (s, 3H), 6.21 (d, J=9 Hz, 1H), 6.64 (t, J=9 Hz, 1H), 6.88 (d, J=9 Hz, 1H), 7.22 (s, 1H), 7.98 (br s, 1H), 8.20-8.22 (m, 1H). ES+−MS: 402.6 [M+H]+.

Provenance & Evidence