1-Benzylpiperazine → HCID 9868181, compound

HRID 1266166Notes

Reaction equation

HRID 1266166 reaction equation
Cl[C:2]1[C:3]([F:21])=[CH:4][C:5]2[C:6]([CH:20]=1)=[N:7][C:8]1[N:9]([CH3:19])[CH:10]=[C:11]([C:16]([OH:18])=[O:17])[C:12](=[O:15])[C:13]=1[CH:14]=2.[CH2:22]([N:29]1[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]1)[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>N1C=CC=CC=1>[F:21][C:3]1[C:2]([N:32]2[CH2:33][CH2:34][N:29]([CH2:22][C:23]3[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=3)[CH2:30][CH2:31]2)=[CH:20][C:6]2=[N:7][C:8]3[N:9]([CH3:19])[CH:10]=[C:11]([C:16]([OH:18])=[O:17])[C:12](=[O:15])[C:13]=3[CH:14]=[C:5]2[CH:4]=1

Participants

4

Reactant 2

HCID 759941-BenzylpiperazineHCID 147005548-Chloro-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid

Product 1

HCID 9868181HCID 9868181, compoundYield 48.1%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

7-Fluoro-8-[4-benzylpiperazin-1-yl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]-naphthyridine-3-carboxylic acid was prepared under the conditions of Example 2, but from 2 g of 8-chloro-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid and 4.6 g of N-benzylpiperazine in 20 cm3 of pyridine. After recrystallizing twice from 25 cm3 of dimethylformamide on each occasion, 1.4 g of 7-fluoro-8-[4-benzylpiperazin-1-yl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid were obtained in the form of a yellow solid melting at about 311° C.

Workup

  1. custom7-Fluoro-8-[4-benzylpiperazin-1-yl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]-naphthyridine-3-carboxylic acid was prepared under the conditions of Example 2
  2. customAfter recrystallizing twice from 25 cm3 of dimethylformamide on each occasion

Sources & evidence

ORD record
ord-752374a718e4482893044f5e323fa38a
Source dataset
uspto-grants-2003_04
Patent number
US06548506B2

Reaction notes

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