Sodium Hydroxide → HCID 19815283, compound

HRID 847084Notes

Reaction equation

HRID 847084 reaction equation
[C:1]([C:3]1[CH:21]=[CH:20][C:6]([CH2:7][N:8]2[C:12]([CH2:13][OH:14])=[C:11]([Cl:15])[N:10]=[C:9]2[CH2:16][CH2:17][CH2:18][CH3:19])=[CH:5][CH:4]=1)#N.[H-].C([Al+]CC(C)C)C(C)C.[OH-:32].[Na+]>C1C=CC=CC=1>[CH:1]([C:3]1[CH:21]=[CH:20][C:6]([CH2:7][N:8]2[C:12]([CH2:13][OH:14])=[C:11]([Cl:15])[N:10]=[C:9]2[CH2:16][CH2:17][CH2:18][CH3:19])=[CH:5][CH:4]=1)=[O:32]

Participants

5

Reactant 3

HCID 14798Sodium HydroxideHCID 19815325HCID 19815325, compoundHCID 21225700Diisobutylaluminumhydride

Product 1

HCID 19815283HCID 19815283, compound

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Procedure

To a solution of 5.05 g of 1-(4-cyanobenzyl)-2-butyl-4-chloro-5-hydroxymethylimidazole in 350 mL of benzene at 25° was added dropwise 22.8 mL of diisobutylaluminum hydride (0.15M in toluene). The mixture was warmed to 45° and stirred for 16 hours. After cooling, the reaction mixture was poured in ice-cold 20% aqueous sulfuric acid. This solution was allowed to warm to 25° and then stirred for 2 hours. The solution was colled to 0°, neutralized using aqueous sodium hydroxide and extracted with ethyl acetate. The combined organic phases were washed with water and brine, dried over anhydrous sodium sulfate, filtered, and concentrated. Column chromatography on silica gel (elution: 0-20% ethyl acetate/benzene) provided 3.60 g of 1-(4-formyl-benzyl)-2-butyl-4-chloro-5-hydroxymethylimidazole; NMR (200 MHz, CDCl3) δ9.96 (s, 1H); 7.47 (A2M2, 4H); 5.26 (s, 2H); 4.42 (s, 2H); 2.54 (t, 2H); 1.64 (quint., 2H); 1.32 (sext., 2H); 0.86 (t, 3H).

Workup

  1. temperatureThe mixture was warmed to 45°
  2. temperatureAfter cooling
  3. temperatureto warm to 25°
  4. stirringstirred for 2 hours
  5. customwas colled to 0°
  6. extractionextracted with ethyl acetate
  7. washThe combined organic phases were washed with water and brine
  8. dry with materialdried over anhydrous sodium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated

Sources & evidence

ORD record
ord-909ad2cacb4a4e45805d2124b4850491
Source dataset
uspto-grants-1992_08
Patent number
US05138069

Reaction notes

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