Dabco → Pradofloxacin

HRID 430581Notes

Reaction equation

HRID 430581 reaction equation
Cl[C:2]1[C:11]([C:12]#[N:13])=[C:10]2[C:5]([C:6](=[O:20])[C:7]([C:17]([OH:19])=[O:18])=[CH:8][N:9]2[CH:14]2[CH2:16][CH2:15]2)=[CH:4][C:3]=1[F:21].[C@@H:22]12[CH2:30][NH:29][CH2:28][C@@H:27]1[CH2:26][CH2:25][CH2:24][NH:23]2.N12CCN(CC1)CC2>CN(C)C=O.C(#N)C>[C:12]([C:11]1[C:2]([N:29]2[CH2:30][C@@H:22]3[C@@H:27]([CH2:26][CH2:25][CH2:24][NH:23]3)[CH2:28]2)=[C:3]([F:21])[CH:4]=[C:5]2[C:10]=1[N:9]([CH:14]1[CH2:16][CH2:15]1)[CH:8]=[C:7]([C:17]([OH:19])=[O:18])[C:6]2=[O:20])#[N:13]

Participants

6

Reactant 3

HCID 9237DabcoHCID 10313138(1S,6S)-2,8-Diazabicyclo(4.3.0)nonaneHCID 153471917-Chloro-8-cyano-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

Product 1

HCID 9802884Pradofloxacin

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6342AcetonitrileSolvent

Procedure

690 mg (2.25 mmol) of 7-chloro-8-cyano-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid are stirred with 312 mg (2.47 mmol) of (1S,6S)-2,8-diazabicyclo[4.3.0]nonane and 504 mg (4.50 mmol) of 1,4-diazabicyclo[2.2.2]octane (DABCO) in a mixture of 6.6 ml of dimethylformamide and 6.6 ml of acetonitrile at room temperature overnight. All the volatile components are removed in vacuo, the residue is taken up in water and the resulting solution is brought to pH 7 with dilute hydrochloric acid. The precipitate formed is filtered off with suction, the filtrate is extracted with methylene chloride and the combined organic phases are dried with sodium sulfate and concentrated in vacuo.

Workup

  1. customAll the volatile components are removed in vacuo
  2. customThe precipitate formed
  3. filtrationis filtered off with suction
  4. extractionthe filtrate is extracted with methylene chloride
  5. dry with materialthe combined organic phases are dried with sodium sulfate
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-34d3c4a23f6940a69f4d288b69ba76b6
Source dataset
uspto-grants-2001_11
Patent number
US06323213B1

Reaction notes

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