1-Ethylpiperazine → HCID 14700568, compound

HRID 981217Notes

Reaction equation

HRID 981217 reaction equation
Cl[C:2]1[C:3]([F:22])=[CH:4][C:5]2[C:6]([CH:21]=1)=[N:7][C:8]1[N:9]([CH2:19][CH3:20])[CH:10]=[C:11]([C:16]([OH:18])=[O:17])[C:12](=[O:15])[C:13]=1[CH:14]=2.[CH2:23]([N:25]1[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]1)[CH3:24]>N1C=CC=CC=1>[CH2:19]([N:9]1[C:8]2[N:7]=[C:6]3[CH:21]=[C:2]([N:28]4[CH2:29][CH2:30][N:25]([CH2:23][CH3:24])[CH2:26][CH2:27]4)[C:3]([F:22])=[CH:4][C:5]3=[CH:14][C:13]=2[C:12](=[O:15])[C:11]([C:16]([OH:18])=[O:17])=[CH:10]1)[CH3:20]

Participants

4

Reactant 2

HCID 791961-EthylpiperazineHCID 147005558-Chloro-1-ethyl-7-fluoro-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid

Product 1

HCID 14700568HCID 14700568, compoundYield 70.4%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

1-Ethyl-8-(4-ethyl-1-piperazinyl)-7-fluoro-4-oxo- 1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid is prepared under the conditions of Reference Example 5 but starting from 1.6 g of 8-chloro-1-ethyl-7-fluoro-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid and 2.3 g of 1-ethylpiperazine in 16 cm3 of pyridine. 1.4 g of 1-ethyl-8-(4-ethyl-1-piperazinyl)-7-fluoro-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid are obtained in the form of a yellow solid melting at 287°-288° C., solvated by 1.6% of water.

Workup

  1. custom1-Ethyl-8-(4-ethyl-1-piperazinyl)-7-fluoro-4-oxo- 1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid is prepared under the conditions of Reference Example 5

Sources & evidence

ORD record
ord-809cab42a01f453a8048b023093dee79
Source dataset
uspto-grants-1991_02
Patent number
US04990515

Reaction notes

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