4-Toluenesulfonyl chloride → HCID 57515381, compound

HRID 44695Notes

Reaction equation

HRID 44695 reaction equation
[CH2:1]([O:3][CH2:4][C:5]1[N:6]([CH2:18][C:19]2([OH:24])[CH2:23][CH2:22][CH2:21][CH2:20]2)[C:7]2[C:16]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[N:10]=[CH:9][C:8]=2[N:17]=1)[CH3:2].C1C=C(Cl)C=C(C(OO)=O)C=1.[OH-].[NH4+:37].S(Cl)(C1C=CC(C)=CC=1)(=O)=O>ClCCl.O>[NH2:37][C:9]1[C:8]2[N:17]=[C:5]([CH2:4][O:3][CH2:1][CH3:2])[N:6]([CH2:18][C:19]3([OH:24])[CH2:23][CH2:22][CH2:21][CH2:20]3)[C:7]=2[C:16]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[N:10]=1

Participants

7

Reactant 4

HCID 73974-Toluenesulfonyl chloride2×HCID 14923Ammonium HydroxideHCID 70297m-Chloroperbenzoic acidHCID 57515382HCID 57515382, compound

Product 1

HCID 57515381HCID 57515381, compoundYield 50%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 1-{[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]methyl}cyclopentanol (3.00 g, 9.22 mmol) in dichloromethane (60 mL) at rt was added m-CPBA (2.89 g, 9.22 mmol). After 1 h, concentrated ammonium hydroxide (60 mL) was added and the mixture was cooled in an ice bath. To the mixture was added TsCl (1.85 g, 9.68 mmol). The reaction was stirred rapidly overnight at rt. Additional TsCl (0.21 g) was added in the morning and the mixture was stirred 45 min. Water (75 mL) was added and the mixture was extracted with dichloromethane (3×100 mL). The combined organic phases were washed with brine and dried over MgSO4, filtered, and concentrated. The resulting foam was treated with acetonitrile and a white solid formed. The solid was recrystallized from acetonitrile and dried under vacuum to yield 1-{[4-amino-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]methyl}cyclopentanol as fine tan crystals (1.57 g, 50%), mp 156.5-158.0° C. 1H NMR (300 MHz, d6-DMSO) δ 8.27 (dm, J=8.4 Hz, 1H), 7.59 (dd, J=8.4, 1.2 Hz, 1H), 7.40 (m, 1H), 7.20 (m, 1H), 6.54 (br s, 2H), 4.89 (br s, 2H), 4.82 (br s, 2H), 4.78 (s, 1H), 3.52 (q, J=7.0 Hz, 2H), 1.75-1.43 (m, 8H), 1.14 (t, J=7.0 Hz, 3H). MS (APCI) m/z 341 (M+H+). Anal. calcd for C19H24N4O2: C, 67.04; H, 7.11; N, 16.46. Found: C, 67.12; H, 6.94; N, 16.36.

Workup

  1. temperaturethe mixture was cooled in an ice bath
  2. stirringthe mixture was stirred 45 min
  3. extractionthe mixture was extracted with dichloromethane (3×100 mL)
  4. washThe combined organic phases were washed with brine
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. additionThe resulting foam was treated with acetonitrile
  9. customa white solid formed
  10. customThe solid was recrystallized from acetonitrile
  11. customdried under vacuum

Sources & evidence

ORD record
ord-b4bcca52279f4005b0692141de5249d1
Source dataset
uspto-grants-2013_09
Patent number
US08541438B2

Reaction notes

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