1-Fluoro-2-nitrobenzene → N-[3-(4-methylpiperazin-1-yl)propyl]-4-nitro-1-aminobenzene

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A 100 mL round bottom flask was dried in an oven overnight and cooled to room temperature under Ar(g). The flask was charged with fluoronitrobenzene (0.187 mL, 1.77 mmol), 3-(4-Methyl-piperazin-1-yl)-propylamine (0.361 g, 2.30 mmol) and dioxane (9.0 mL). To the resulting solution diisopropyl ethyl amine (0.463 mL, 2.66 mmol) was added dropwise and allowed to stir at 105° C. for 48 h. The mixture was extracted with EtOAc (3×30 mL), and with brine (2×30 mL). The combined organic layers were then dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The crude mixture was then purified over silica (10% MeOH/90% CHCl3) affording a yellow solid (0.365 g, 1.31 mmol, 74% yield).

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