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Triethylamine → 7-(1-Acetylamino-3-azabicyclo[3.1.0]hex-3-yl)-6-fluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, ethyl ester

HRID 258394
Notes
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Reaction equation

HRID 258394 reaction equation
[C:1]([NH:4][C:5]12[CH2:10][CH:9]1[CH2:8][NH:7][CH2:6]2)(=[O:3])[CH3:2].[CH2:11](N(CC)CC)[CH3:12].Cl[C:19]1[N:28]=[C:27]2[C:22]([C:23](=[O:40])[C:24]([C:37]([OH:39])=[O:38])=[CH:25][N:26]2[C:29]2[CH:34]=[CH:33][C:32]([F:35])=[CH:31][C:30]=2[F:36])=[CH:21][C:20]=1[F:41]>C(#N)C>[C:1]([NH:4][C:5]12[CH2:10][CH:9]1[CH2:8][N:7]([C:19]1[N:28]=[C:27]3[C:22]([C:23](=[O:40])[C:24]([C:37]([O:39][CH2:11][CH3:12])=[O:38])=[CH:25][N:26]3[C:29]3[CH:34]=[CH:33][C:32]([F:35])=[CH:31][C:30]=3[F:36])=[CH:21][C:20]=1[F:41])[CH2:6]2)(=[O:3])[CH3:2]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 105460847-Chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acidHCID 157134351-Acetylamino-3-azabicyclo[3.1.0]hexane

Product 1

HCID 157134587-(1-Acetylamino-3-azabicyclo[3.1.0]hex-3-yl)-6-fluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, ethyl esterYield 100%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 1-acetylamino-3-azabicyclo[3.1.0]-hexane (60 mg, 0.28 mmol) and triethylamine (195 μl, 1.4 mmol) in acetonitrile (10 ml) was treated with the ethyl ester of 7-chloro-6-fluoro-1-{2,4-difluoro-phenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid (95.6 mg, 0.25 mmol) and heated to 80° for 20 hours. The reaction mixture was concentrated in vacuo, diluted with chloroform and washed with saturated aqueous sodium bicarbonate. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was chromatographed on silica gel (eluant: 189:10:1 chloroform: methanol: conc. ammonium hydroxide) to yield the title product as a yellow oil (120.8 mg, 0.25 mmol, 100% yield). 1H NMR (CDCl3) 8.35 (s, 1H), 8.01 (d, J=13 Hz, 1H), 7.36 (m, 1H), 7.04 (m, 2H), 6.11 (bs, 1H), 4.35 (q, J=7 Hz, 2H), 3.96 (vbs, 1H), 3.69 (vbs, 3H), 1.96 (s, 3H), 1.73 (m, 1H), 1.37 (t, J=7 Hz, 3H), 1.06 (m, 1H), 0.71 (m, 1H).

Workup

  1. temperatureheated to 80° for 20 hours
  2. concentrationThe reaction mixture was concentrated in vacuo
  3. additiondiluted with chloroform
  4. washwashed with saturated aqueous sodium bicarbonate
  5. dry with materialThe organic layer was dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was chromatographed on silica gel (eluant: 189:10:1 chloroform: methanol: conc. ammonium hydroxide)

Sources & evidence

ORD record
ord-24e294ee57554cdd8206d617c9c0b23b
Source dataset
uspto-grants-1993_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05266569

Reaction notes

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