Hydroxyamine hydrochloride → HCID 86675156, compound

HRID 1502972Notes

Reaction equation

HRID 1502972 reaction equation
[F:1][C:2]([F:27])([F:26])[CH:3]([C:17]1[CH:22]=[C:21]([Cl:23])[C:20]([Cl:24])=[C:19]([Cl:25])[CH:18]=1)/[CH:4]=[CH:5]/[C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[C:12](=O)[CH2:11][CH2:10][CH2:9]2.Cl.[NH2:29][OH:30].C([O-])(=O)C.[Na+]>CCO>[F:1][C:2]([F:27])([F:26])[CH:3]([C:17]1[CH:22]=[C:21]([Cl:23])[C:20]([Cl:24])=[C:19]([Cl:25])[CH:18]=1)/[CH:4]=[CH:5]/[C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[C:12](=[N:29][OH:30])[CH2:11][CH2:10][CH2:9]2

Participants

5

Reactant 3

HCID 443297Hydroxyamine hydrochlorideHCID 517045Sodium AcetateHCID 86675157HCID 86675157, compound

Product 1

HCID 86675156HCID 86675156, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a stirred solution of ((E)-6-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-enyl)-3,4-dihydronaphthalen-1(2H)-one (0.4 g, 0.92 mmol) in EtOH (50 mL) were added hydroxylamine hydrochloride (0.128 g, 1.85 mmol) and sodium acetate (0.23 g, 2.77 mmol), and the reaction mixture was heated at reflux for 3 h. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with water and extracted with EtOAc. The combined organic extracts were washed with brine, dried over anhydrous Na2SO4 and concentrated under reduced pressure to give the crude compound, which was purified by flash column chromatography (SiO2, 100-200 mesh; 10-15% EtOAc in petroleum ether). The title compound was isolated as a solid (0.3 g, 73%): mp 155-158° C.; 1H NMR (400 MHz, CDCl3) δ 7.89 (d, J=8.4 Hz, 1H), 7.41 (s, 2H), 7.24 (m, 1H), 7.17 (m, 1H), 6.57 (d, J=16 Hz, 1H), 6.46 (dd, J=16.0, 8.0 Hz, 1H), 4.13 (m, 1H), 2.82 (m, 4H), 2.04 (m, 2H); ESIMS m/z 445.95 ([M−H]−).

Workup

  1. temperaturethe reaction mixture was heated
  2. temperatureat reflux for 3 h
  3. concentrationThe reaction mixture was concentrated under reduced pressure
  4. additionthe residue was diluted with water
  5. extractionextracted with EtOAc
  6. washThe combined organic extracts were washed with brine
  7. dry with materialdried over anhydrous Na2SO4
  8. concentrationconcentrated under reduced pressure
  9. customto give the crude compound, which
  10. customwas purified by flash column chromatography (SiO2, 100-200 mesh; 10-15% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-08669b0ba2364d8c9748d4cc55a6eb77
Source dataset
uspto-grants-2015_12
Patent number
US09211281B2

Reaction notes

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