Water → 4-Methoxy-gamma-oxobenzenebutanoic acid

HRID 487527Notes

Reaction equation

HRID 487527 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH2:3][CH2:2]1.[N+]([C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)([O-])=O.[Cl-].[Al+3].[Cl-].[Cl-].[OH2:21].Cl[CH:23](Cl)C(Cl)Cl>>[O:21]([C:11]1[CH:16]=[CH:15][C:14]([C:1]([CH2:2][CH2:3][C:4]([OH:6])=[O:5])=[O:7])=[CH:13][CH:12]=1)[CH3:23]

Participants

6

Reactant 5

HCID 962WaterHCID 65911,1,2,2-TetrachloroethaneHCID 7416NitrobenzeneHCID 7922Succinic anhydrideHCID 6451240Aluminum(III) Chloride

Product 1

HCID 766134-Methoxy-gamma-oxobenzenebutanoic acidYield 88%

Procedure

As illustrated in Scheme 3, a solution of p-anisole (4.32 g, 50 mmol) and succinic anhydride (4.14 g, 40 mmol) were combined in 1,1,2,2-tetrachloroethane (10 mL) and nitrobenzene (40 mL) at 4° C. Aluminum chloride (24.56 g, 180 mmol) was then added gradually. The temperature was kept at 0°-5° C. and stirred overnight. Water was added and neutralized to quench the reaction. The aqueous phase was separated and washed with ether then reacidified and washed with ether again. The ether fractions were combined, dried and evaporated. The remaining residue was purified by flash silica chromatography to yield a white solid (7.55 g, 88%). 1H-NMR (CDCl3) δ 7.98 (d, 3H), 6.88 (d, 2H), 3.76 (s, 3H), 3.30 (t, 2H), 2.76 (t, 2H).

Workup

  1. customat 4° C
  2. customwas kept at 0°-5° C.
  3. customto quench
  4. customthe reaction
  5. customThe aqueous phase was separated
  6. washwashed with ether
  7. washwashed with ether again
  8. customdried
  9. customevaporated
  10. customThe remaining residue was purified by flash silica chromatography

Sources & evidence

ORD record
ord-5cad2e9d92d1479fad2dab16d7b2ef8e
Source dataset
uspto-grants-1994_03
Patent number
US05296350

Reaction notes

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