Hydrochloric Acid → 1-[4-amino-2-ethoxymethyl-7-(1-methyl-1H-imidazol-2-ylmethoxy)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol

HRID 2383191Notes

Reaction equation

HRID 2383191 reaction equation
[NH2:1][C:2]1[C:11]2[N:12]=[C:13]([CH2:20][O:21][CH2:22][CH3:23])[N:14]([CH2:15][C:16]([OH:19])([CH3:18])[CH3:17])[C:10]=2[C:9]2[CH:8]=[CH:7][C:6]([OH:24])=[CH:5][C:4]=2[N:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].Cl[CH2:32][C:33]1[N:34]([CH3:38])[CH:35]=[CH:36][N:37]=1.Cl>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.CN(C=O)C.C(N(CC)CC)C>[NH2:1][C:2]1[C:11]2[N:12]=[C:13]([CH2:20][O:21][CH2:22][CH3:23])[N:14]([CH2:15][C:16]([CH3:18])([OH:19])[CH3:17])[C:10]=2[C:9]2[CH:8]=[CH:7][C:6]([O:24][CH2:32][C:33]3[N:34]([CH3:38])[CH:35]=[CH:36][N:37]=3)=[CH:5][C:4]=2[N:3]=1

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 10796Cesium carbonateHCID 7365362-(chloromethyl)-1-methyl-1H-imidazoleHCID 1363405384-amino-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-ol

Product 1

HCID 575452951-[4-amino-2-ethoxymethyl-7-(1-methyl-1H-imidazol-2-ylmethoxy)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol

Reagents, catalysts & solvents 3

HCID 74236Tetrabutylammonium BromideCatalystHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Procedure

4-Amino-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-ol (100 mg, 0.3 mmol), cesium carbonate (488 mg, 1.5 mmol), 2-chloromethyl-1-methyl-1H-imidazole.HCl (100 mg, 0.6 mmol), tetrabutylammonium bromide (96 mg, 0.3 mmol), triethylamine (0.5 ml), and DMF (10 mL) were combined and stirred at ambient temperature overnight. The reaction was concentrated under reduced pressure and dichloromethane was added to the residue. Undissolved solids were removed by filtration. The filtrate was concentrated under reduced pressure and subsequently purified by flash column chromatography on silica gel, eluting with a gradient of 0-5% methanol in dichloromethane. The clean fractions were combined and concentrated under reduced pressure. The resulting solid was recrystallized from isopropanol/diethylether to yield 40 mg of 1-[4-amino-2-ethoxymethyl-7-(1-methyl-1H-imidazol-2-ylmethoxy)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol as an off white solid, mp 200.0-202.0° C.

Workup

  1. concentrationThe reaction was concentrated under reduced pressure and dichloromethane
  2. additionwas added to the residue
  3. customwere removed by filtration
  4. concentrationThe filtrate was concentrated under reduced pressure
  5. customsubsequently purified by flash column chromatography on silica gel
  6. washeluting with a gradient of 0-5% methanol in dichloromethane
  7. concentrationconcentrated under reduced pressure
  8. customThe resulting solid was recrystallized from isopropanol/diethylether

Sources & evidence

ORD record
ord-0eb4be82d9a748df93be727a8916dbf2
Source dataset
uspto-grants-2012_09
Patent number
US08263594B2

Reaction notes

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