Sodium Iodide → (R)-5-(2-Azido-1-((tert-butyldimethylsilyl)oxy)ethyl)-8-(benzyloxy)quinolin-2(1H)-one

HRID 1472738Notes

Reaction equation

HRID 1472738 reaction equation
[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([C@@H:20]([O:23][Si:24]([C:27]([CH3:30])([CH3:29])[CH3:28])([CH3:26])[CH3:25])[CH2:21]Br)=[C:13]2[C:18]=1[NH:17][C:16](=[O:19])[CH:15]=[CH:14]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[I-].[Na+].[N-:33]=[N+:34]=[N-:35].[Na+]>CN(C)C=O.O>[N:33]([CH2:21][C@@H:20]([C:12]1[CH:11]=[CH:10][C:9]([O:8][CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)=[C:18]2[C:13]=1[CH:14]=[CH:15][C:16](=[O:19])[NH:17]2)[O:23][Si:24]([C:27]([CH3:30])([CH3:29])[CH3:28])([CH3:26])[CH3:25])=[N+:34]=[N-:35]

Participants

6

Reactant 3

HCID 5238Sodium IodideHCID 33557Sodium AzideHCID 15606253(R)-8-(benzyloxy)-5-(2-bromo-1-((tert-butyldimethylsilyl)oxy)ethyl)quinolin-2(1H)-one

Product 1

HCID 58505233(R)-5-(2-Azido-1-((tert-butyldimethylsilyl)oxy)ethyl)-8-(benzyloxy)quinolin-2(1H)-oneYield 78.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 6228DimethylformamideSolvent

Procedure

(R)-8-(Benzyloxy)-5-(2-bromo-1-(tert-butyldimethylsilyloxy)ethyl)-quinolin-2(1H)-one (5.0 g, 10.2 mmol) was dissolved in dimethyl formamide (90 mL) and water (10 mL). Sodium iodide (1.7 g, 11.3 mmol) and sodium azide (0.7 g, 11.3 mmol) were added sequentially. The reaction mixture was stirred at RT until all the solid was in solution. The solution was heated at 80° C. for 40 hours then cooled to RT and diluted with water (300 mL). The aqueous layer was extracted with dichloromethane, and the combined organic extracts were dried (magnesium sulfate), filtered and concentrated under reduced pressure. The crude residue was recrystallised from ethyl acetate and iso-hexane to afford the desired compound, (3.6 g, 78%), used without further purification in the next step.

Workup

  1. temperatureThe solution was heated at 80° C. for 40 hours
  2. temperaturethen cooled to RT
  3. extractionThe aqueous layer was extracted with dichloromethane
  4. dry with materialthe combined organic extracts were dried (magnesium sulfate)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude residue was recrystallised from ethyl acetate and iso-hexane

Sources & evidence

ORD record
ord-87108f1bdfd14a9baac8c710efe54ea3
Source dataset
uspto-grants-2015_04
Patent number
US09012644B2

Reaction notes

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