Sodium Hydroxide → 1-[2'-Carbomethoxybiphenyl-4-yl)methyl-2-(1-transbutenyl)-4-chloro-5-hydroxymethylimidazole

HRID 653895Notes

Reaction equation

HRID 653895 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[C:11]1[CH:16]=[CH:15][C:14]([CH2:17][N:18]2[C:22]([CH:23]=[O:24])=[C:21]([Cl:25])[N:20]=[C:19]2/[CH:26]=[CH:27]/[CH2:28][CH3:29])=[CH:13][CH:12]=1)([O:3][CH3:4])=[O:2].[BH4-].[Na+].[OH-].[Na+]>CO.O>[C:1]([C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[C:11]1[CH:16]=[CH:15][C:14]([CH2:17][N:18]2[C:22]([CH2:23][OH:24])=[C:21]([Cl:25])[N:20]=[C:19]2/[CH:26]=[CH:27]/[CH2:28][CH3:29])=[CH:13][CH:12]=1)([O:3][CH3:4])=[O:2]

Participants

6

Reactant 3

HCID 14798Sodium HydroxideHCID 4311764Sodium borohydrideHCID 198153781-[(2'-Carbomethoxybiphenyl-4-yl)methyl]-2-(1-trans-butenyl)-4-chloroimidazole-5-carboxaldehyde

Product 1

HCID 198153051-[2'-Carbomethoxybiphenyl-4-yl)methyl-2-(1-transbutenyl)-4-chloro-5-hydroxymethylimidazoleYield 88%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 0.26 g of 1-[(2'-carbomethoxybiphenyl-4-yl)methyl]-2-(1-trans-butenyl)-4-chloroimidazole-5-carboxaldehyde in 10 mL of methanol at 0° C. was added 0.24 g of sodium borohydride portionwise over 0.5 hours. The mixture was stirred for an additional 0.5 hours at 0° C. and then poured into a solution at 10% sodium hydroxide in water. The resulting mixture was extracted with ethyl acetate, and the combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. Column chromatography (elution:ethyl acetate/benzene) provided 0.23 g of 1-[2'-carbomethoxybiphenyl-4-yl)methyl-2-(1-transbutenyl)-4-chloro-5-hydroxymethylimidazole. NMR (200 MHz, CDCl3) δ 7.84 (d, 1H); 7.53 (t, 1H); 7.40 (t, 1H); 7.29 (m, 3H); 7.08 (d, 2H); 6.86 (d of t, 1H); 6.17 (d, 1H); 5.30 (s, 2H); 4.54 (br s, 2H); 3.63 (s, 3H); 2.23 (quint., 2H); 1.04 (t, 3H).

Workup

  1. extractionThe resulting mixture was extracted with ethyl acetate
  2. washthe combined organic phases were washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. washColumn chromatography (elution:ethyl acetate/benzene)

Sources & evidence

ORD record
ord-d5492df21ade4cb0b1f055123d847081
Source dataset
uspto-grants-1992_07
Patent number
US05128355

Reaction notes

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