Pyridine → Tert-butyl(1-(4-(5-(methoxyimino)-3-phenyl-5,6,7,8-tetrahydroquinolin-2-yl)phenyl)cyclobutyl)carbamate

HRID 1509072Notes

Reaction equation

HRID 1509072 reaction equation
[C:1]([O:5][C:6](=[O:35])[NH:7][C:8]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]3[C:27]([C:28]4[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=4)=[CH:26][C:25]4[C:24](=O)[CH2:23][CH2:22][CH2:21][C:20]=4[N:19]=3)=[CH:14][CH:13]=2)[CH2:11][CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].Cl.[CH3:37][O:38][NH2:39].N1C=CC=CC=1>C(O)C>[C:1]([O:5][C:6](=[O:35])[NH:7][C:8]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]3[C:27]([C:28]4[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=4)=[CH:26][C:25]4[C:24](=[N:39][O:38][CH3:37])[CH2:23][CH2:22][CH2:21][C:20]=4[N:19]=3)=[CH:14][CH:13]=2)[CH2:9][CH2:10][CH2:11]1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 1049PyridineHCID 521874O-Methylhydroxylamine hydrochlorideHCID 123451908Tert-butyl(1-(4-(5-oxo-3-phenyl-5,6,7,8-tetrahydroquinolin-2-yl)phenyl)cyclobutyl)carbamate

Product 1

HCID 131734395Tert-butyl(1-(4-(5-(methoxyimino)-3-phenyl-5,6,7,8-tetrahydroquinolin-2-yl)phenyl)cyclobutyl)carbamateYield 46.5%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
90 °C

Procedure

To a solution of tert-butyl(1-(4-(5-oxo-3-phenyl-5,6,7,8-tetrahydroquinolin-2-yl)phenyl)cyclobutyl)carbamate (90 mg, 0.19 mmol) in anhydrous ethanol (2.0 mL) was added O-methylhydroxylamine hydrochloride (80 mg, 0.96 mmol) and pyridine (80 μL, 0.99 mmol). The resulting yellow solution was heated to 90° C. under a nitrogen atmosphere. The reaction mixture was allowed to cool to room temperature and concentrated to dryness under reduced pressure. The residue was mixed with water (2.0 mL) and extracted into ethyl acetate (3×2.0 mL). The combined organic phases were washed with brine (2×4.0 mL), dried over Na2SO4, filtered and concentrated to dryness under reduced pressure to give a yellow oil. The residue was purified by Biotage chromatography (silica, hexane:ethyl acetate, gradient elution from 95:5 to 60:40) to give the desired product as a white solid (44 mg, 46% yield). 1H-NMR (500 MHz, CD3OD) δ 8.29 (1H, s), 7.35 (2H, d), 7.26-7.32 (5H, m), 7.16-7.21 (2H, m), 4.01 (3H, s), 3.02 (2H, t), 2.83 (2H, t), 2.36-2.52 (4H, m), 2.04-2.16 (1H, m), 2.01 (2H, p), 1.81-1.92 (1H, m), 1.15-1.50 (9H, br m). LCMS (Method A) RT=8.28 min, M+H+=498.10.

Workup

  1. temperatureto cool to room temperature
  2. concentrationconcentrated to dryness under reduced pressure
  3. additionThe residue was mixed with water (2.0 mL)
  4. extractionextracted into ethyl acetate (3×2.0 mL)
  5. washThe combined organic phases were washed with brine (2×4.0 mL)
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated to dryness under reduced pressure
  9. customto give a yellow oil
  10. customThe residue was purified by Biotage chromatography (silica, hexane:ethyl acetate, gradient elution from 95:5 to 60:40)

Sources & evidence

ORD record
ord-2bed308a122a4b51b6f5db024aed7306
Source dataset
uspto-grants-2015_12
Patent number
US09221838B2

Reaction notes

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