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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 275206
Notes
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Reaction equation

HRID 275206 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), 1H37 (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-f5ce43b59e0e4736989a4038876e8c90
Source dataset
uspto-grants-1995_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05391763

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes