Acetic Acid → 3-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-propionic acid

HRID 924696Notes

Reaction equation

HRID 924696 reaction equation
C([O:3][C:4](=[O:23])[CH:5](C#N)[CH:6]([C:14]1[CH:19]=[CH:18][C:17]([Br:20])=[CH:16][CH:15]=1)[C:7]1[CH:12]=[CH:11][C:10]([Cl:13])=[CH:9][CH:8]=1)C.C(O)(=O)C.S(=O)(=O)(O)O>O>[Br:20][C:17]1[CH:16]=[CH:15][C:14]([CH:6]([C:7]2[CH:8]=[CH:9][C:10]([Cl:13])=[CH:11][CH:12]=2)[CH2:5][C:4]([OH:23])=[O:3])=[CH:19][CH:18]=1

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 1118Sulfuric AcidHCID 576913973-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-2-cyano-propionic acid ethyl ester

Product 1

HCID 576913963-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-propionic acidYield 50%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A mixture of 3-(4-bromo-phenyl)-3-(4-chloro-phenyl)-2-cyano-propionic acid ethyl ester (1.91, 4.87 mmol), acetic acid (10 ml), concentrated sulfuric acid (5 ml) and water (5 ml) were refluxed for 2 hours. Reaction mixture was poured into iced water and extracted with ethyl acetate. The organic layer was separated, dried (MgSO4), filtered and concentrated, the crude product was purified over flash silica chromatography eluting with ethyl acetate/petroleum ether (1:1) to afford the desired product (0.82 g, 50% yield). LC/MS: (PS-A2) Rt 3.39 [M+H]− 338.86.

Workup

  1. temperaturewere refluxed for 2 hours
  2. customReaction mixture
  3. extractionextracted with ethyl acetate
  4. customThe organic layer was separated
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customthe crude product was purified over flash silica chromatography
  9. washeluting with ethyl acetate/petroleum ether (1:1)

Sources & evidence

ORD record
ord-b65cb734ea414fc39485563954caa6ff
Source dataset
uspto-grants-2016_03
Patent number
US09283226B2

Reaction notes

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