Dimethylformamide → Delafloxacin

HRID 1274749Notes

Reaction equation

HRID 1274749 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[Cl: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[Cl: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

6

Reactant 4

HCID 6228DimethylformamideHCID 84541-MethylpyrrolidineHCID 27592903-Hydroxyazetidine hydrochlorideHCID 154349011-(6-Amino-3,5-difluoro-2-pyridinyl)-8-chloro-6,7-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

Product 1

HCID 487101DelafloxacinYield 92.4%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
85 °C

Procedure

To 3.5 g of N,N-dimethylformamide were added 2.00 g of 1-(6-amino-3,5-difluoropyridine-2-yl)-8-chloro-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, 1.00 g of 3-hydroxyazetidine hydrochloride, and 2.00 g of N-methylpyrrolidine together with 0.2 ml of ethanol, and the mixture was stirred at 85° C. for 10 minutes. The solvent and the like were distilled off under reduced pressure. After adding 10 ml. of ethanol to the residue, the mixture was heated under reflux for 10 minutes and allowed to cool, and the precipitate was collected by filtration and washed with ethanol and diisopropylether successively to obtain 2.10 g of the title compound as a pale yellow powder.

Workup

  1. distillationThe solvent and the like were distilled off under reduced pressure
  2. additionAfter adding 10 ml
  3. temperatureof ethanol to the residue, the mixture was heated
  4. temperatureunder reflux for 10 minutes
  5. temperatureto cool
  6. filtrationthe precipitate was collected by filtration
  7. washwashed with ethanol and diisopropylether successively

Sources & evidence

ORD record
ord-327b795019874c008a57e7be18abe7cf
Source dataset
uspto-grants-2000_12
Patent number
US06156903

Reaction notes

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