Sodium Bicarbonate → (11R)-11-(1-{[tert-butyl(dimethyl)silyl]oxy}-1-methylethyl)-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinoline

HRID 221545Notes

Reaction equation

HRID 221545 reaction equation
[Si:1]([O:8][C:9]([CH3:36])([CH3:35])[C@H:10]([N:20]1[C:32]2[C:31]3[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=3[N:25]=[CH:24][C:23]=2[N:22]=[C:21]1[CH2:33]Cl)[CH2:11][O:12][Si](C(C)(C)C)(C)C)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[F-].C([N+](CCCC)(CCCC)CCCC)CCC.C([O-])(O)=O.[Na+]>C(Cl)Cl>[Si:1]([O:8][C:9]([C@@H:10]1[N:20]2[C:32]3[C:31]4[C:26](=[CH:27][CH:28]=[CH:29][CH:30]=4)[N:25]=[CH:24][C:23]=3[N:22]=[C:21]2[CH2:33][O:12][CH2:11]1)([CH3:35])[CH3:36])([C:4]([CH3:6])([CH3:7])[CH3:5])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 516892Sodium BicarbonateHCID 2724141Tetrabutylammonium Fluoride2×HCID 671569791-[(1R)-2-{[tert-butyl(dimethyl)silyl]oxy}-1-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-methylpropyl]-2-(chloromethyl)-1H-imidazo[4,5-c]quinoline

Product 1

HCID 67156212(11R)-11-(1-{[tert-butyl(dimethyl)silyl]oxy}-1-methylethyl)-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinolineYield 90.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
-78 °C

Procedure

1-[(1R)-2-{[tert-Butyl(dimethyl)silyl]oxy}-1-({[tert-butyl(dimethyl)silyl]oxy}methyl)-2-methylpropyl]-2-(chloromethyl)-1H-imidazo[4,5-c]quinoline (1.74 g, 3.18 mmol) was dissolved in 80 mL of CH2Cl2 and the solution was cooled to −78° C. under N2. Tetrabutylammonium fluoride (1.0 M solution in THF, 3.50 mL) was added slowly and the stirred reaction mixture was allowed to warm to ambient temperature overnight. The reaction mixture was then treated with an additional 0.3 mL of tetrabutylammonium fluoride solution and stirring was continued for 2 days. The reaction mixture was then treated with saturated NaHCO3 solution, and the layers were separated. The organic portion was washed with brine (4×20 mL), dried over Na2SO4, filtered and concentrated under reduced pressure. Chromatography (SiO2, 2-5% MeOH/CHCl3) gave (11R)-11-(1-{[tert-butyl(dimethyl)silyl]oxy}-1-methylethyl)-10,11-dihydro-8H-[1,4]oxazino[4′,3′:1,2]imidazo[4,5-c]quinoline (1.14 g) as a yellow syrup.

Workup

  1. customthe stirred reaction mixture
  2. temperatureto warm to ambient temperature overnight
  3. customthe layers were separated
  4. washThe organic portion was washed with brine (4×20 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-0b9c7a7c57f341189143307b17e85dec
Source dataset
uspto-grants-2012_06
Patent number
US08207162B2

Reaction notes

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