3-Fluorobenzyl bromide → 6-Fluoro-1-(3-fluorobenzyl)-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic acid ethyl ester

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This compound was prepared from 6-fluoro-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic acid ethyl ester (80) and 3-fluorobenzyl bromide according to General Procedure B. Yield 113 mg (8%), MP 113° C.; 1H-NMR (DMSO-d6): δ 1.29 (t, J=7.2 Hz, 3H), 3.15 (m, 4H), 3.90 (m, 4H), 4.33 (q, J=7.2 Hz, 2H), 5.55 (s, 2H), 7.08 (m, 3H), 7.15 (dd, J=3.6, 5.2 Hz, 1H), 7.34 (m, 1H), 7.46 (dd, J=1.2, 3.6 Hz, 1H), 7.80 (dd, J=1.2, 5.2 Hz, 1H), 8.17 (dd, J=2.8, 8.8 Hz, 1H), 8.74 (d, J=2.8 Hz, 1H); EIMS: 539 (M+1). Anal. (C27H24F2N4O4S) C, H, N.

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