Isopropyl iodide → 5-Isopropoxyquinoline

HRID 1908122Notes

Reaction equation

HRID 1908122 reaction equation
[N:1]1[C:10]2[CH:9]=[CH:8][CH:7]=[C:6]([OH:11])[C:5]=2[CH:4]=[CH:3][CH:2]=1.C([O-])([O-])=O.[K+].[K+].I[CH:19]([CH3:21])[CH3:20]>CN(C=O)C>[CH:19]([O:11][C:6]1[CH:7]=[CH:8][CH:9]=[C:10]2[C:5]=1[CH:4]=[CH:3][CH:2]=[N:1]2)([CH3:21])[CH3:20]

Participants

5

Reactant 3

HCID 6362Isopropyl iodideHCID 11430Potassium CarbonateHCID 135441757Quinolin-5-ol

Product 1

HCID 585508625-IsopropoxyquinolineYield 91%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

To a mixture of quinolin-5-ol (2.00 g, 13.8 mmol) and K2CO3 (7.62 g, 55.1 mmol) in DMF (20 mL) was added 2-iodopropane (2.76 mL, 27.6 mmol). The reaction mixture was heated at 80° C. overnight before it was partitioned between EtOAc and water. The layers were separated and the aqueous layer was extracted with EtOAc (2×). The combined organic layers were washed with brine, dried over MgSO4 and concentrated to dryness. The crude material was purified by column chromatography (10-20% EtOAc-Hex) to provide 5-isopropoxyquinoline (91%) as a light yellow oil. ESI-MS m/z calc 187.1. found 188.3 (M+1)+. Retention time: 1.06 minutes (3 min run).

Workup

  1. customwas partitioned between EtOAc and water
  2. customThe layers were separated
  3. extractionthe aqueous layer was extracted with EtOAc (2×)
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over MgSO4
  6. concentrationconcentrated to dryness
  7. customThe crude material was purified by column chromatography (10-20% EtOAc-Hex)

Sources & evidence

ORD record
ord-f56cdee661604d0e987e9ce8431a1536
Source dataset
uspto-grants-2013_12
Patent number
US08598164B2

Reaction notes

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