Potassium Carbonate → 2-[5-(2-Bromo-phenyl)-tetrazol-1-yl]-1-[4-(4-chloro-phenyl)-piperazin-1-yl]-ethanone

HRID 1372135Notes

Reaction equation

HRID 1372135 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[NH:12][N:11]=[N:10][N:9]=1.C(=O)([O-])[O-].[K+].[K+].Cl[CH2:20][C:21]([N:23]1[CH2:28][CH2:27][N:26]([C:29]2[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][CH:30]=2)[CH2:25][CH2:24]1)=[O:22]>CN(C=O)C>[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[N:12]([CH2:20][C:21]([N:23]2[CH2:24][CH2:25][N:26]([C:29]3[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][CH:30]=3)[CH2:27][CH2:28]2)=[O:22])[N:11]=[N:10][N:9]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 40539571-(Chloroacetyl)-4-(4-chlorophenyl)piperazineHCID 1784193735-(2-Bromophenyl)-1H-tetrazole

Product 1

HCID 210711152-[5-(2-Bromo-phenyl)-tetrazol-1-yl]-1-[4-(4-chloro-phenyl)-piperazin-1-yl]-ethanone

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

5-(2-Bromo-phenyl)-1H-tetrazole (0.374 g, 1.66 mmol) was taken in dry DMF (15 mL) and dry potassium carbonate (800 mg) and KI (20 mg) was added to it and stirred at rt for 1 h under nitrogen. 2-Chloro-1-[4-(4-chloro-phenyl)-piperazin-1-yl]-ethanone (500 mg, 1.8 mmol) in DMF (5 mL) was then added to the mixture through a syringe. The reaction was then heated at 140° C. for 14 h, cooled and quenched with water and extracted with ethyl acetate. Drying of the organic layer with Na2SO4 followed by concentration afforded material that was further purified by flash column chromatography (ethyl acetate/pet ether): 1H NMR (300 MHz, CDCl3): δ 7.90 (d, 1H), 7.74 (d, 1H), 7.45 (t, 1H), 7.35 (t, 1H), 7.25 (d, 2H), 6.87 (d, 2H), 5.65 (s, 2H), 3.84 (m, 2H), 3.73 (m, 2H), 3.20 (m, 4H).

Workup

  1. temperatureThe reaction was then heated at 140° C. for 14 h
  2. temperaturecooled
  3. customquenched with water
  4. extractionextracted with ethyl acetate
  5. dry with materialDrying of the organic layer with Na2SO4
  6. concentrationfollowed by concentration
  7. customafforded material that
  8. customwas further purified by flash column chromatography (ethyl acetate/pet ether)

Sources & evidence

ORD record
ord-1936bf421ce3485b939863c212c53a40
Source dataset
uspto-grants-2007_01
Patent number
US07157464B2

Reaction notes

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