2-Methylpiperazine → 5-Amino-1-cyclopropyl-8-difluoromethoxy-6-fluoro-7-(3-methylpiperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

HRID 1461051ノート

反応式

HRID 1461051 の反応式
[CH3:1][CH:2]1[CH2:7][NH:6][CH2:5][CH2:4][NH:3]1.[NH2:8][C:9]1[C:18]([F:19])=[C:17](F)[C:16]([O:21][CH:22]([F:24])[F:23])=[C:15]2[C:10]=1[C:11](=[O:31])[C:12]([C:28]([OH:30])=[O:29])=[CH:13][N:14]2[CH:25]1[CH2:27][CH2:26]1>N1C=CC=CC=1>[NH2:8][C:9]1[C:18]([F:19])=[C:17]([N:6]2[CH2:5][CH2:4][NH:3][CH:2]([CH3:1])[CH2:7]2)[C:16]([O:21][CH:22]([F:23])[F:24])=[C:15]2[C:10]=1[C:11](=[O:31])[C:12]([C:28]([OH:30])=[O:29])=[CH:13][N:14]2[CH:25]1[CH2:26][CH2:27]1

参加物

4

反応物 2

HCID 660572-MethylpiperazineHCID 150238455-Amino-1-cyclopropyl-8-difluoromethoxy-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

生成物 1

HCID 150238035-Amino-1-cyclopropyl-8-difluoromethoxy-6-fluoro-7-(3-methylpiperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acid収率 64.9%

試薬・触媒・溶媒 1

HCID 1049Pyridine溶媒

実験手順

1.30 g (0.013 moles) of 2-methylpiperazine was added to a solution of 0.90 g (0.0026 moles) of 5-amino-1-cyclopropyl-8-difluoromethoxy-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (prepared as described in Preparation 11) in 8 ml of pyridine, and the mixture was stirred at 105°-110° C. for 2 hours. At the end of this time, the solvent was removed by distillation under reduced pressure. Water was added to the residue, and the resulting mixture was neutralized (to about pH 7) by the addition of acetic acid; the mixture was then extracted with chloroform. The extract was washed with water, dried over anhydrous sodium sulfate, and concentrated by evaporation under reduced pressure. The resulting residue was washed with ethanol to give 0.72 g of 5-amino-1-cyclopropyl-8-difluoromethoxy-6-fluoro-7-(3-methylpiperazinyl)-1,4-dihydro-4-oxoquinoline-3-carboxylic acid as a yellow powder, melting at 283°-286° C.

後処理

  1. customAt the end of this time, the solvent was removed by distillation under reduced pressure
  2. additionWater was added to the residue
  3. additionby the addition of acetic acid
  4. extractionthe mixture was then extracted with chloroform
  5. washThe extract was washed with water
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated by evaporation under reduced pressure
  8. washThe resulting residue was washed with ethanol

出典と根拠

ORDレコード
ord-123b04071d73437e8a2faff21991a064
出典データセット
uspto-grants-1991_12
特許番号
US05073556

反応ノート

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