1-(2-Furoyl)piperazine → 6-Fluoro-2-oxo-4-[4-(furan-2-carbonyl)-piperazine-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile
Reaktionsgleichung
Cl[C:2]1[C:11]2[C:6](=[N:7][CH:8]=[C:9]([F:12])[CH:10]=2)[NH:5][C:4](=[O:13])[C:3]=1[C:14]#[N:15].[O:16]1[CH:20]=[CH:19][CH:18]=[C:17]1[C:21]([N:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1)=[O:22]>>[F:12][C:9]1[CH:10]=[C:11]2[C:6](=[N:7][CH:8]=1)[NH:5][C:4](=[O:13])[C:3]([C:14]#[N:15])=[C:2]2[N:26]1[CH2:27][CH2:28][N:23]([C:21]([C:17]2[O:16][CH:20]=[CH:19][CH:18]=2)=[O:22])[CH2:24][CH2:25]1Komponenten
3
Versuchsvorschrift
This compound was prepared from 4-chloro-6-fluoro-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile (96) and 2-furoyl piperazine according to general procedure E to yield 2.87 g (71%) of 6-fluoro-2-oxo-4-[4-(furan-2-carbonyl)-piperazine-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile (99) as white solids. MP 312° C.; 1H-NMR (DMSO-d6): δ 3.69 (m, 4H), 3.93 (m, 4H), 6.66 (dd, J=1.6, 3.6 Hz, 1H), 7.08 (d, J=3.6 Hz, 1H), 7.89 (d, J=1.6 Hz, 1H), 8.07 (dd, J=2.8, 9.2 Hz, 1H), 8.69 (d, J=2.8 Hz, 1H), 12.30 (s, 1H); EIMS: 368 (M+1).