5-Benzylamino-1-cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid → 7-(4-Acetyl-3-methyl-1-piperazinyl)-5-benzylamino-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

HRID 373527Notes

Reaction equation

HRID 373527 reaction equation
[CH2:1]([NH:8][C:9]1[C:18]([F:19])=[C:17](F)[CH:16]=[C:15]2[C:10]=1[C:11](=[O:27])[C:12]([C:24]([OH:26])=[O:25])=[CH:13][N:14]2[CH:21]1[CH2:23][CH2:22]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:28]([N:31]1[CH2:36][CH2:35][NH:34][CH2:33][CH:32]1[CH3:37])(=[O:30])[CH3:29]>N1C=CC=CC=1>[C:28]([N:31]1[CH2:36][CH2:35][N:34]([C:17]2[CH:16]=[C:15]3[C:10]([C:11](=[O:27])[C:12]([C:24]([OH:26])=[O:25])=[CH:13][N:14]3[CH:21]3[CH2:23][CH2:22]3)=[C:9]([NH:8][CH2:1][C:2]3[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=3)[C:18]=2[F:19])[CH2:33][CH:32]1[CH3:37])(=[O:30])[CH3:29]

Participants

4

Reactant 2

HCID 148802085-Benzylamino-1-cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acidHCID 157294091-(2-Methylpiperazin-1-yl)ethan-1-one

Product 1

HCID 198106217-(4-Acetyl-3-methyl-1-piperazinyl)-5-benzylamino-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

A mixture of 5-benzylamino-1-cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 1-acetyl-2-methylpiperazine and pyridine was heated under reflux. The reaction mixture was concentrated under reduced pressure, and water was added to the residue. The mixture was extracted with chloroform. The extract was dried and chloroform was evaporated. Ethanol was added to the residue, and the crystals were collected by filtration to give 7-(4-acetyl-3-methyl-1-piperazinyl)-5-benzylamino-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid. It was recrystallized from ethanol/diisopropyl ether. m.p. 235°-236° C.

Workup

  1. temperaturewas heated
  2. temperatureunder reflux
  3. concentrationThe reaction mixture was concentrated under reduced pressure, and water
  4. additionwas added to the residue
  5. extractionThe mixture was extracted with chloroform
  6. customThe extract was dried
  7. customchloroform was evaporated
  8. additionEthanol was added to the residue
  9. filtrationthe crystals were collected by filtration

Sources & evidence

ORD record
ord-6f70d3e97d024bb8b1fb7792cd699205
Source dataset
uspto-grants-1992_11
Patent number
US05164392

Reaction notes

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