Triethylamine → 2-(4-Chloro-phenyl)-1-(4-methanesulfonyl-phenyl)-1H-imidazole-4-carbaldehyde

HRID 1353005Notes

Reaction equation

HRID 1353005 reaction equation
C(Cl)(=O)C(Cl)=O.[Cl:7][C:8]1[CH:13]=[CH:12][C:11]([C:14]2[N:15]([C:21]3[CH:26]=[CH:25][C:24]([S:27]([CH3:30])(=[O:29])=[O:28])=[CH:23][CH:22]=3)[CH:16]=[C:17]([CH2:19][OH:20])[N:18]=2)=[CH:10][CH:9]=1.C(N(CC)CC)C>ClCCl.CS(C)=O>[Cl:7][C:8]1[CH:13]=[CH:12][C:11]([C:14]2[N:15]([C:21]3[CH:26]=[CH:25][C:24]([S:27]([CH3:30])(=[O:28])=[O:29])=[CH:23][CH:22]=3)[CH:16]=[C:17]([CH:19]=[O:20])[N:18]=2)=[CH:10][CH:9]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 108325102-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazole-4-methanol

Product 1

HCID 117929022-(4-Chloro-phenyl)-1-(4-methanesulfonyl-phenyl)-1H-imidazole-4-carbaldehydeYield 49.4%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolvent2×HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

To 8 ml of a 1:1 mixture of dimethyl sulfoxide and dichloromethane stirring in a dry ice/isopropanol bath under nitrogen was added dropwise oxalyl chloride (321 μl, 3.69 mmol). After stirring for 10 minutes, a solution of 2-(4-chlorophenyl)-1-[4-(methylsulfonyl)phenyl]-1H-imidazole-4-methanol (Example 158) (670 mg, 1.85 mmol) in 25 ml of a 1:1 mixture of dimethyl sulfoxide and dichloromethane. Stirring was continued while warming to 0° C., where it was maintained for 15 minutes. Triethylamine (1.87 g, 18.5 mmol) was added, and the mixture was stirred overnight while warming to room temperature. The mixture was partitioned between dichloromethane and water, the organic layer was washed with water and then brine, dried over sodium sulfate, filtered, and evaporated. Chromatography of the residue. over silica gel using mixtures of ethyl acetate and hexane gave the title compound as an off-white solid (330 mg): mp (DSC) 203° C. Anal. Calc'd. for C17H13ClN2O3S (MW 360.82): C, 56.59; H, 3.63; N, 7.76. Found: C, 56.24; H, 3.62; N, 7.50.

Workup

  1. stirringStirring
  2. temperaturewhere it was maintained for 15 minutes
  3. stirringthe mixture was stirred overnight
  4. temperaturewhile warming to room temperature
  5. customThe mixture was partitioned between dichloromethane and water
  6. washthe organic layer was washed with water
  7. dry with materialbrine, dried over sodium sulfate
  8. filtrationfiltered
  9. customevaporated

Sources & evidence

ORD record
ord-c4cc86a1ca5f4de39c648871ba013652
Source dataset
uspto-grants-2007_05
Patent number
US07220770B2

Reaction notes

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