Imidazole → 8-(Tert-butyldimethylsilyloxy)quinoline-2-carbaldehyde

HRID 876401

Reaction equation

HRID 876401 reaction equation
[OH:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9]([CH:12]=[O:13])[CH:8]=[CH:7]2.N1C=CN=C1.[C:19]([Si:23](Cl)([CH3:25])[CH3:24])([CH3:22])([CH3:21])[CH3:20]>C(Cl)Cl>[Si:23]([O:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9]([CH:12]=[O:13])[CH:8]=[CH:7]2)([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:25])[CH3:24]

Participants

5

Reactant 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 5993428-Hydroxy-2-quinolinecarboxaldehyde

Product 1

HCID 585670828-(Tert-butyldimethylsilyloxy)quinoline-2-carbaldehydeYield 83%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

8-Hydroxyquinoline-2-carbaldehyde (5.00 g, 28.9 mmol) and imidazole (4.32 g, 63.5 mmol) were dissolved in DCM (50 mL) under N2. The reaction mixture was cooled to 0° C., followed by addition of tert-butylchlorodimethylsilane (4.94 g, 31.8 mmol). After stirring for 16 hours at ambient temperature the reaction mixture was partitioned between DCM and H2O. The organic layer was washed with H2O and aqueous saturated NaHCO3, dried over Na2SO4, filtered and concentrated under reduced pressure to afford an orange oil. The residue was purified by flash column chromatography (10:1 Hexanes/EtOAc) to provide 6.85 g (83%) of desired product as a yellow/orange oil.

Workup

  1. customwas partitioned between DCM and H2O
  2. washThe organic layer was washed with H2O and aqueous saturated NaHCO3
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customto afford an orange oil
  7. customThe residue was purified by flash column chromatography (10:1 Hexanes/EtOAc)

Sources & evidence

ORD record
ord-a4b6dd338c934e2d88337b6f40bda95d
Source dataset
uspto-grants-2015_03
Patent number
US08987251B2

Linked notes

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