4-Toluenesulfonyl chloride → HCID 58837353, compound

HRID 521334Notes

Reaction equation

HRID 521334 reaction equation
C1C=C(Cl)C=C(C(OO)=O)C=1.[CH2:12]([O:14][CH2:15][C:16]1[N:17]([CH2:29][C:30](=[O:33])[CH2:31][CH3:32])[C:18]2[C:27]3[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=3[N:21]=[CH:20][C:19]=2[N:28]=1)[CH3:13].[OH-].[NH4+:35].C1(C)C=CC(S(Cl)(=O)=O)=CC=1>C(Cl)(Cl)Cl>[NH2:35][C:20]1[C:19]2[N:28]=[C:16]([CH2:15][O:14][CH2:12][CH3:13])[N:17]([CH2:29][C:30](=[O:33])[CH2:31][CH3:32])[C:18]=2[C:27]2[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=2[N:21]=1

Participants

6

Reactant 4

HCID 73974-Toluenesulfonyl chlorideHCID 14923Ammonium HydroxideHCID 70297m-Chloroperbenzoic acidHCID 68931351HCID 68931351, compound

Product 1

HCID 58837353HCID 58837353, compound

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Conditions

Temperature
0 °C

Procedure

mCPBA (2.11 g, 8.57 mmol) was added to a solution of 1-[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]butan-2-one (1.96 g, 6.59 mmol) in chloroform (30 mL) at room temperature. The reaction mixture was stirred for 1 hour, then was cooled to 0° C. Concentrated ammonium hydroxide (10 mL) and p-toluenesulfonyl chloride (1.38 g, 7.25 mmol) were added. The mixture was stirred at 0° C. for 1 hour, then was filtered. The filtrate was diluted with dichloromethane (50 mL) and saturated aqueous sodium bicarbonate (50 mL). The layers were separated and the aqueous layer was extracted with dichloromethane (25 mL). The organic layers were combined, dried over magnesium sulfate, filtered, and concentrated to yield a brown solid. The solid was purified by chromatography on a HORIZON High-Performance Flash Chromatography (HPFC) instrument (available from Biotage, Inc, Charlottesville, Va., USA) (silica gel, gradient elution with 0-35% of a solution comprised of 80% CHCl3, 18% MeOH, and 2% conc. NH4OH (CMA) in chloroform) to afford a tan solid that was recrystallized from chloroform/hexanes. The crystals were isolated by filtration and dried in a vacuum oven at 80° C. to afford 0.718 g of 1-[4-amino-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]butan-2-one as pale pink needles, mp 187-188° C.

Workup

  1. stirringThe mixture was stirred at 0° C. for 1 hour
  2. filtrationwas filtered
  3. additionThe filtrate was diluted with dichloromethane (50 mL) and saturated aqueous sodium bicarbonate (50 mL)
  4. customThe layers were separated
  5. extractionthe aqueous layer was extracted with dichloromethane (25 mL)
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customto yield a brown solid
  10. customThe solid was purified by chromatography on a HORIZON High-Performance Flash Chromatography (HPFC) instrument (available from Biotage, Inc, Charlottesville, Va., USA) (silica gel, gradient elution with 0-35% of a solution comprised of 80% CHCl3, 18% MeOH, and 2% conc. NH4OH (CMA) in chloroform)
  11. customto afford a tan solid
  12. customthat was recrystallized from chloroform/hexanes
  13. customThe crystals were isolated by filtration
  14. customdried in a vacuum oven at 80° C.

Sources & evidence

ORD record
ord-4004a08cd55b4947992018d266189d62
Source dataset
uspto-grants-2016_05
Patent number
US09328110B2

Reaction notes

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