1,8-Diazabicyclo(5.4.0)undec-7-ene → 7-(cis-3-t-Butoxycarbonylamino-4-methyl-1-pyrrolidinyl)-6,8-difluoro-1-(2-fluoroethyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

HRID 580590Notes

Reaction equation

HRID 580590 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([F:13])[C:11]=1F)[N:8]([CH2:14][CH2:15][F:16])[CH:7]=[C:6]([C:17]([OH:19])=[O:18])[C:5]2=[O:20].[C:21]([O:25][C:26]([NH:28][C@H:29]1[C@@H:33]([CH3:34])[CH2:32][NH:31][CH2:30]1)=[O:27])([CH3:24])([CH3:23])[CH3:22].C1CCN2C(=NCCC2)CC1>C(#N)C>[C:21]([O:25][C:26]([NH:28][C@H:29]1[C@@H:33]([CH3:34])[CH2:32][N:31]([C:11]2[C:10]([F:13])=[C:9]3[C:4]([C:5](=[O:20])[C:6]([C:17]([OH:19])=[O:18])=[CH:7][N:8]3[CH2:14][CH2:15][F:16])=[CH:3][C:2]=2[F:1])[CH2:30]1)=[O:27])([CH3:24])([CH3:22])[CH3:23]

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 11138119(3S,4S)-3-(Boc-amino)-4-methylpyrrolidineHCID 127709081-(2-Fluoroethyl)-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

Product 1

HCID 867422497-(cis-3-t-Butoxycarbonylamino-4-methyl-1-pyrrolidinyl)-6,8-difluoro-1-(2-fluoroethyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acidYield 62.8%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 6,7,8-trifluoro-1-(2-fluoroethyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid (0.5 g), anhydrous acetonitrile (5 ml), cis-3-t-butoxycarbonylamino-4-methylpyrrolidine (0.5 g) and DBU (0.27 g) was refluxed for an hour and then concentrated. The resulting residue was dissolved in chloroform and the solution was washed with 10% aqueous citric acid solution. After concentration of the chloroform layer, the resulting precipitate was triturated in water, and collected by filtration and washed with water, methanol and ether successively to give the title compound (0.51 g) as white powder, mp 217°-219° C.

Workup

  1. temperaturewas refluxed for an hour
  2. concentrationconcentrated
  3. dissolutionThe resulting residue was dissolved in chloroform
  4. washthe solution was washed with 10% aqueous citric acid solution
  5. customAfter concentration of the chloroform layer, the resulting precipitate was triturated in water
  6. filtrationcollected by filtration
  7. washwashed with water, methanol and ether successively

Sources & evidence

ORD record
ord-c6b8985c7fac49b795c3d29364acab73
Source dataset
uspto-grants-1988_06
Patent number
US04753953

Reaction notes

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