Piperazine → 6-Fluoro-1-methyl-2-oxo-4-(piperazin-1-yl)-1,2-dihydro-quinolin-3-carbonitrile

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Reaction Steps

A solution of Compound 47 (750 mg, 3.17 mmol) in dichloromethane was added slowly to a stirred solution of piperazine (819 mg, 9.50 mmol) in dichloromethane at room temperature. The solution was stirred overnight at room temperature. The solvent was removed under reduced pressure. The residue was taken in water, sonicated briefly, and filtered. The solids were dissolved in ethyl acetate and washed by water. The organic layer was dried over Na2SO4 and concentrated to yield 780 mg (86%) of yellow solids. M.P. 211° C. 1H NMR (DMSO-d6): δ 2.91 (m, 4H), 3.47 (m, 4H), 3.56 (s, 3H), 7.54 (m, 1H), 7.63 (m, 2H). EIMS m/z 287 (M+1).

Provenance & Evidence