1-(Thien-2-ylcarbonyl)piperazine → 6-Methyl-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-1,2-dihydro-quinolin-3-carbonitrile

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Reaction Conditions

Reaction Steps

Piperazine-1-yl-thiophen-2-yl-methanone (8.73 g, 41.16 mmol) was added to a solution of Compound 106 (4.5 g, 20.08 mmol) in toluene (50 mL) and heated overnight at 110° C. The solvent was removed under vacuum. The residue was suspended in water, sonicated, and filtered. The crude product was purified by flash chromatography eluting with 0–2% methanol in dichloromethane gradient to yield 7.0 g (92%) of white solids. M.P. 269° C. 1H NMR (DMSO-d6): δ 2.34 (s, 3H), 3.65 (m, 4H), 3.92 (m, 4H), 7.14 (m, 1H), 7.23 (d, J=8.4 Hz, 1H), 7.43 (d, J=8.6 Hz, 1H), 7.49 (d, J=3.5 Hz, 1H), 7.51 (s, 1H), 7.81 (d, J=4.8 Hz, 1H). EIMS m/z 379 (M+1).

Provenance & Evidence