4-Bromobenzoyl chloride → 4-Bromo-N-{5-[4-(pyridin-3-yloxy)phenyl]-1,3,4-oxadiazol-2-yl}-benzamide

HRID 1994051Notes

Reaction equation

HRID 1994051 reaction equation
Br.[N:2]1[CH:7]=[CH:6][CH:5]=[C:4]([O:8][C:9]2[CH:14]=[CH:13][C:12]([C:15]3[O:19][C:18]([NH2:20])=[N:17][N:16]=3)=[CH:11][CH:10]=2)[CH:3]=1.[Br:21][C:22]1[CH:30]=[CH:29][C:25]([C:26](Cl)=[O:27])=[CH:24][CH:23]=1>N1C=CC=CC=1.CO>[Br:21][C:22]1[CH:30]=[CH:29][C:25]([C:26]([NH:20][C:18]2[O:19][C:15]([C:12]3[CH:11]=[CH:10][C:9]([O:8][C:4]4[CH:3]=[N:2][CH:7]=[CH:6][CH:5]=4)=[CH:14][CH:13]=3)=[N:16][N:17]=2)=[O:27])=[CH:24][CH:23]=1

Participants

5

Reactant 2

HCID 685154-Bromobenzoyl chlorideHCID 686796585-[4-(Pyridin-3-yloxy)phenyl]-1,3,4-oxadiazol-2-amine hydrobromide salt

Product 1

HCID 591354334-Bromo-N-{5-[4-(pyridin-3-yloxy)phenyl]-1,3,4-oxadiazol-2-yl}-benzamideYield 21.3%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 1049PyridineSolvent

Procedure

5-[4-(Pyridin-3-yloxy)phenyl]-1,3,4-oxadiazol-2-amine hydrobromide salt (167.5 mg, 0.5 mmol) was suspended in 2 mL of anhydrous pyridine. 4-Bromobenzoyl chloride (164.6 mg, 0.75 mmol) was added to the solution. The reaction mixture formed an orange-red solution with a small amount of white precipitate. It was left to stir for 3 hours. Then it was diluted with ca. 1 mL of MeOH, filtered through 0.22 u syringe filter and purified by reverse phase preparative HPLC using acetonitrile/water mixture containing 0.01% of TFA. Fractions, containing the product, were combined and partitioned between ca. 40 mL of EtOAc and ca. 40 mL of saturated aqueous NaHCO3. The EtOAc layer was washed with brine, dried over anhydrous sodium sulfate and filtered. Solvent was removed in vacuo to give the title product as a yellow solid (46.5 mg). Yield 21.2%.

Workup

  1. customThe reaction mixture formed an orange-red solution with a small amount of white precipitate
  2. waitIt was left
  3. filtrationfiltered through 0.22 u syringe
  4. filtrationfilter
  5. custompurified by reverse phase preparative HPLC
  6. additioncontaining 0.01% of TFA
  7. additionFractions, containing the product
  8. custompartitioned between ca. 40 mL of EtOAc and ca. 40 mL of saturated aqueous NaHCO3
  9. washThe EtOAc layer was washed with brine
  10. dry with materialdried over anhydrous sodium sulfate
  11. filtrationfiltered
  12. customSolvent was removed in vacuo

Sources & evidence

ORD record
ord-6006fcfbe5874263a10305721a265558
Source dataset
uspto-grants-2010_01
Patent number
US07652051B2

Reaction notes

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