HCID 66906475, compound → HCID 66906265, compound

HRID 1915169Notes

Reaction equation

HRID 1915169 reaction equation
C[O:2][C:3](=[O:26])[C:4]1[C:5](=[C:10]([O:14][CH2:15][C:16]2[S:20][C:19]3[CH:21]=[CH:22][CH:23]=[CH:24][C:18]=3[C:17]=2[Cl:25])[CH:11]=[CH:12][CH:13]=1)[C:6]([O:8]C)=[O:7]>[OH-].[Na+]>[Cl:25][C:17]1[C:18]2[CH:24]=[CH:23][CH:22]=[CH:21][C:19]=2[S:20][C:16]=1[CH2:15][O:14][C:10]1[CH:11]=[CH:12][CH:13]=[C:4]([C:3]([OH:26])=[O:2])[C:5]=1[C:6]([OH:8])=[O:7]

Participants

3

Reactant 1

HCID 66906475HCID 66906475, compound

Product 1

HCID 66906265HCID 66906265, compoundYield 92%

Reagents, catalysts & solvents 1

HCID 14798Sodium HydroxideSolvent

Procedure

A solution of 3-(3-chloro-benzo[b]thiophen-2-ylmethoxy)-phthalic acid dimethyl ester (1.9 g, 4.8 mmol) in reagent alcohol (120 mL) and 3 N sodium hydroxide (60 mL) was refluxed for two hours. The solution was evaporated and the residue was dissolved in water (100 mL) and washed with methylene chloride (3×100 mL) then acidified to pH around 4. The resulting mixture was extracted with ethyl acetate (2×100 mL) and the combined organic layers was washed with water (2×100 mL), dried and concentrated to give 3-(3-chloro-benzo[b]thiophen-2-ylmethoxy)-phthalic acid as an off-white solid (1.6 g, 92% yield). The product was used in the next step without further purification.

Workup

  1. customThe solution was evaporated
  2. dissolutionthe residue was dissolved in water (100 mL)
  3. washwashed with methylene chloride (3×100 mL)
  4. extractionThe resulting mixture was extracted with ethyl acetate (2×100 mL)
  5. washthe combined organic layers was washed with water (2×100 mL)
  6. customdried
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-6782eaadcd9f4832a4c301d021c38bbe
Source dataset
uspto-grants-2013_12
Patent number
US08614328B2

Reaction notes

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