Trimethyl orthoformate → [4-(6-{[bis(1H-imidazol-2-ylmethyl)amino]methyl}-1-propyl-1H-benzimidazol-2-yl)butyl]dipropylamine

HRID 348758Notes

Reaction equation

HRID 348758 reaction equation
[NH2:1][CH2:2][C:3]1[CH:4]=[CH:5][C:6]2[N:10]=[C:9]([CH2:11][CH2:12][CH2:13][CH2:14][N:15]([CH2:19][CH2:20][CH3:21])[CH2:16][CH2:17][CH3:18])[N:8]([CH2:22][CH2:23][CH3:24])[C:7]=2[CH:25]=1.C(OC)(OC)OC.[NH:33]1[CH:37]=[CH:36][N:35]=[C:34]1[CH:38]=O.[BH4-].[Na+]>CO>[NH:33]1[CH:37]=[CH:36][N:35]=[C:34]1[CH2:38][N:1]([CH2:2][C:3]1[CH:4]=[CH:5][C:6]2[N:10]=[C:9]([CH2:11][CH2:12][CH2:13][CH2:14][N:15]([CH2:16][CH2:17][CH3:18])[CH2:19][CH2:20][CH3:21])[N:8]([CH2:22][CH2:23][CH3:24])[C:7]=2[CH:25]=1)[CH2:11][C:9]1[NH:8][CH:7]=[CH:6][N:10]=1

Participants

6

Reactant 4

HCID 9005Trimethyl orthoformateHCID 249551H-imidazole-2-carbaldehydeHCID 4311764Sodium borohydrideHCID 23079304[4-(6-aminomethyl-1-propyl-1H-benzimidazol-2-yl)butyl]dipropylamine

Product 1

HCID 11577013[4-(6-{[bis(1H-imidazol-2-ylmethyl)amino]methyl}-1-propyl-1H-benzimidazol-2-yl)butyl]dipropylamine

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
0 °C

Procedure

The compound (130 mg) obtained in Example 125-6 was dissolved in methanol (3.0 ml) and added with trimethyl orthoformate (0.130 ml) and 2-imidazole carboxaldehyde (37.3 mg), followed by stirring for 1 hour. Then, the solution was cooled to 0° C. The solution was added with sodium borohydride (21.5 mg) and stirred at room temperature for 3 hours. After completion of the reaction, the solvent was distilled off under reduced pressure and the residue was then dissolved in chloroform. The solution was washed with a 1 mol/l sodium hydroxide aqueous solution and then subjected to extraction with chloroform. The organic layer was washed with saturated saline solution and then dried with anhydrous sodium sulfate. After filtration, the solvent was distilled off under reduced pressure. Then, the residue was purified through silica gel column chromatography (chloroform/methanol) and treated with hydrochloric acid, thereby obtaining hydrochloride (16.4 mg) of the subject compound as a white solid.

Workup

  1. stirringstirred at room temperature for 3 hours
  2. customAfter completion of the reaction
  3. distillationthe solvent was distilled off under reduced pressure
  4. dissolutionthe residue was then dissolved in chloroform
  5. washThe solution was washed with a 1 mol/l sodium hydroxide aqueous solution
  6. extractionsubjected to extraction with chloroform
  7. washThe organic layer was washed with saturated saline solution
  8. dry with materialdried with anhydrous sodium sulfate
  9. filtrationAfter filtration
  10. distillationthe solvent was distilled off under reduced pressure
  11. customThen, the residue was purified through silica gel column chromatography (chloroform/methanol)
  12. additiontreated with hydrochloric acid

Sources & evidence

ORD record
ord-4c6a2b7b7b544befa5324ee261fffff6
Source dataset
uspto-grants-2007_02
Patent number
US07176227B2

Reaction notes

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