Dimethylformamide → Delafloxacin Impurity 21

HRID 368481Notes

Reaction equation

HRID 368481 reaction equation
CN(C)C=O.[NH2:6][C:7]1[N:12]=[C:11]([N:13]2[C:22]3[C:17](=[CH:18][C:19]([F:25])=[C:20](F)[C:21]=3[F:23])[C:16](=[O:26])[C:15]([C:27]([OH:29])=[O:28])=[CH:14]2)[C:10]([F:30])=[CH:9][C:8]=1[F:31].Cl.[OH:33][CH:34]1[CH2:37][NH:36][CH2:35]1.CN1CCCC1>C(O)C>[NH2:6][C:7]1[N:12]=[C:11]([N:13]2[C:22]3[C:17](=[CH:18][C:19]([F:25])=[C:20]([N:36]4[CH2:37][CH:34]([OH:33])[CH2:35]4)[C:21]=3[F:23])[C:16](=[O:26])[C:15]([C:27]([OH:29])=[O:28])=[CH:14]2)[C:10]([F:30])=[CH:9][C:8]=1[F:31]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 84541-MethylpyrrolidineHCID 27592903-Hydroxyazetidine hydrochlorideHCID 221211661-(6-Amino-3,5-difluoropyridin-2-yl)-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Product 1

HCID 510375Delafloxacin Impurity 21Yield 63%

Reagents, catalysts & solvents 2

HCID 702EthanolCatalystHCID 702EthanolSolvent

Procedure

To 280 mg of N,N-dimethylformamide were added 125 mg 1-(6-amino-3,5-difluoropyridine-2-yl)-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, 60 mg of 3-hydroxyazetidine hydrochloride, and 120 mg of N-methylpyrrolidine together with 3 drops of ethanol, and the mixture was stirred at 85 C for 10 minutes. After adding 0.8 ml of ethanol, the solution was allowed to cool, and the precipitate was collected by filtration and washed with ethanol and diisopropylether successively to obtain 90 mg of the title compound as a pale yellow powder.

Workup

  1. temperatureto cool
  2. filtrationthe precipitate was collected by filtration
  3. washwashed with ethanol and diisopropylether successively

Sources & evidence

ORD record
ord-5e11c51909ab44b080a1ea9c2bd8df93
Source dataset
uspto-grants-2000_10
Patent number
US06133284

Reaction notes

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