Allyl bromide → 6-(allyloxy)-3,4-dihydroquinolin-2(1H)-one

HRID 1023182Notes

Reaction equation

HRID 1023182 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[NH:8][C:7](=[O:12])[CH2:6][CH2:5]2.C([O-])([O-])=O.[K+].[K+].[CH2:19](Br)[CH:20]=[CH2:21]>CN(C=O)C>[CH2:21]([O:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[NH:8][C:7](=[O:12])[CH2:6][CH2:5]2)[CH:20]=[CH2:19]

Participants

5

Reactant 3

HCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 27740406-Hydroxy-3,4-dihydro-2(1H)-quinolinone

Product 1

HCID 190680326-(allyloxy)-3,4-dihydroquinolin-2(1H)-oneYield 91%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 6-hydroxy-3,4-dihydroquinolin-2(1H)-one (1.5 g, 9.19 mmol) in DMF (20 mL), K2CO3 (2.54 g, 18.39 mmol) and allyl bromide (0.955 mL, 11.03 mmol) were added. The reaction mixture was stirred at room temperature for 3 h then concentrated. The residue was dissolved in ethyl acetate, washed with 10% NaOH solution, water, and brine. The organic layer was dried over anhydrous sodium sulfate, and concentrated to give 6-(allyloxy)-3,4-dihydroquinolin-2(1H)-one as a white solid (1.7 g, 89%). 1HNMR: 400 MHz, DMSO-d6: δ 2.40 (q, J=7.60 Hz, 2H), 2.83 (t, J=8.00 Hz, 2H), 4.48-4.50 (m, 2H), 5.22-5.26 (m, 1H), 5.35-5.40 (m, 1H), 5.97-6.07 (m, 1H), 6.72-6.80 (m, 3H), 9.89 (s, 1H), LCMS (ES-API), RT 1.566 min, m/z 204.2 (M+H).

Workup

  1. concentrationthen concentrated
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed with 10% NaOH solution, water, and brine
  4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-55766cf25ffb432ca94398d76cf16d0c
Source dataset
uspto-grants-2014_05
Patent number
US08722670B2

Reaction notes

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