Water → [4-[3-(Benzylamino)-4-nitrophenyl]piperazin-1-yl]-phenylmethanone

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A solution of N-benzyl-5-bromo-2-nitrobenzenamine (50 mg, 0.16 mmol) and phenyl(piperazin-1-yl)methanone (93 mg, 0.48 mmol) in NMP (1 mL) was heated to 110° C. for 16 h. The solution was cooled to room temperature to which was slowly added H2O (5 mL). The resulting yellow precipitate was filtered, washed with 2 mL of water, dried (high vacuum, 14 h) to furnish (4-(3-(benzylamino)-4-nitrophenyl)piperazin-1-yl)(phenyl)methanone (520 mg, 2.18 mmol), 92% yield. 1H NMR (500 MHz, CDCl3) d (ppm) 8.85 (m, 1H), 8.14 (d, J=9.5 Hz, 1H), 7.51-7.3 (m, 10H), 6.24 (dd, J=2.5 Hz, 10 Hz, 1H), 5.88 (d, J=2.5 Hz, 1H), 4.55 (d, J=5 Hz, 2H) 3.9-3.2 (m, 8H).+ESI HRMS (calcd for C24H24N4O3Na, M+Na) 439.1746, found 439.1741

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