Sodium Thiosulfate → 3-hydroxy-5-{[(1S)-1-(hydroxymethyl)propyl]oxy}-N-(1-methyl-1H-pyrazol-3-yl)benzamide

HRID 1990204Notes

Reaction equation

HRID 1990204 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]([CH:14]=[C:15]([O:17][C@H:18]([CH2:21][O:22]C)[CH2:19][CH3:20])[CH:16]=1)[C:5]([NH:7][C:8]1[CH:12]=[CH:11][N:10]([CH3:13])[N:9]=1)=[O:6].I[Si](C)(C)C.C(=O)([O-])O.[Na+].S([O-])([O-])(=O)=S.[Na+].[Na+]>C(#N)C>[OH:1][C:2]1[CH:3]=[C:4]([CH:14]=[C:15]([O:17][C@H:18]([CH2:21][OH:22])[CH2:19][CH3:20])[CH:16]=1)[C:5]([NH:7][C:8]1[CH:12]=[CH:11][N:10]([CH3:13])[N:9]=1)=[O:6]

Participants

6

Reactant 4

HCID 24477Sodium ThiosulfateHCID 85247Trimethylsilyl iodideHCID 516892Sodium BicarbonateHCID 591271273-hydroxy-5-{[(1S)-1-(methoxymethyl)propyl]oxy}-N-(1-methyl-1H-pyrazol-3-yl)benzamide

Product 1

HCID 591271493-hydroxy-5-{[(1S)-1-(hydroxymethyl)propyl]oxy}-N-(1-methyl-1H-pyrazol-3-yl)benzamideYield 82.9%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 3-hydroxy-5-({(1S)-1-[(methyloxy)methyl]propyl}oxy)-N-(1-methyl-1H-pyrazol-3-yl)benzamide (500 mg, 1.6 mmol) in acetonitrile (25 mL), iodotrimethylsilane (1.11 mL, 7.8 mmol) was added and the resulting mixture stirred for 16 hours. Saturated sodium hydrogencarbonate solution (10 mL) was added, the solution stirred for 10 mins, saturated aqueous sodium thiosulfate (5 mL) was added then the acetonitrile was removed in vacuo. The residual aqueous layer was extracted with ethyl acetate (3×40 mL) and the organic layers combined, dried (MgSO4), filtered and evaporated and purified by column chromatography, eluting with 85% ethyl acetate in isohexane, to give the title compound as a colourless foam (405 mg). 1H NMR δ (d6-DMSO): 0.95 (t, 3H), 1.5-1.8 (m, 2H), 3.5 (m, 2H), 3.8 (s, 3H), 4.3 (m, 1H), 4.8 (t, 1H), 6.45 (s, 1H), 6.55 (s, 1H), 6.9 (s, 1H), 7.05 (s, 1H), 7.55 (s, 1H), 9.6 (s, 1H); m/z 306 (M+H)+

Workup

  1. stirringthe solution stirred for 10 mins
  2. customthe acetonitrile was removed in vacuo
  3. extractionThe residual aqueous layer was extracted with ethyl acetate (3×40 mL)
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. customevaporated
  7. custompurified by column chromatography
  8. washeluting with 85% ethyl acetate in isohexane

Sources & evidence

ORD record
ord-b36f1a61e6c44d8f9dbb1df74cb19713
Source dataset
uspto-grants-2010_01
Patent number
US07642259B2

Reaction notes

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