1-(Thien-2-ylcarbonyl)piperazine → 6-Fluoro-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazine-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile

HRID 901276Notes

Reaction equation

HRID 901276 reaction equation
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].[N:16]1([C:22]([C:24]2[S:25][CH:26]=[CH:27][CH:28]=2)=[O:23])[CH2:21][CH2:20][NH:19][CH2:18][CH2:17]1>>[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:19]1[CH2:20][CH2:21][N:16]([C:22]([C:24]2[S:25][CH:26]=[CH:27][CH:28]=2)=[O:23])[CH2:17][CH2:18]1

Participants

3

Reactant 2

HCID 7975621-(Thien-2-ylcarbonyl)piperazineHCID 692171714-Chloro-6-fluoro-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile

Product 1

HCID 692162166-Fluoro-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazine-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrileYield 79%

Procedure

This compound was prepared from 4-chloro-6-fluoro-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile (96) and piperazin-1-yl-thiophene-2-yl-methanone according to general procedure E to yield 4.85 g (79%) of 6-fluoro-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazine-1-yl]-1,2-dihydro-[1,8]-naphthyridine-3-carbonitrile (98) as yellow solids. MP 244° C.; 1H-NMR (DMSO-d6): δ 3.72 (m, 4H), 3.91 (m, 4H), 7.16 (dd, J=3.6, 4.8 Hz, 1H), 7.49 (d, J=3.6 Hz, 1H), 7.80 (d, J=5.2 Hz, 1H), 8.05 (dd, J=2.8, 7.2 Hz, 1H), 8.70 (d, J=2.8 Hz, 1H); EIMS: 384 (M+1).

Sources & evidence

ORD record
ord-08466d8bb7c440999556229ee9a10d05
Source dataset
uspto-grants-2008_04
Patent number
US07361760B2

Reaction notes

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