Tetrahydrofuran → HCID 21961347, compound

HRID 1017902Notes

Reaction equation

HRID 1017902 reaction equation
[CH:1]([C:4]1[CH:9]=[CH:8][C:7]([CH:10]2[C:14]3[C:15]([CH3:34])=[C:16]([NH:21][C:22]([C:24]4[CH:33]=[CH:32][C:27]([C:28]([O:30]C)=[O:29])=[CH:26][CH:25]=4)=[O:23])[C:17]([CH3:20])=[C:18]([CH3:19])[C:13]=3[O:12][C:11]2([CH3:36])[CH3:35])=[CH:6][CH:5]=1)([CH3:3])[CH3:2].O1CCCC1.[OH-].[Na+]>CO>[CH:1]([C:4]1[CH:5]=[CH:6][C:7]([CH:10]2[C:14]3[C:15]([CH3:34])=[C:16]([NH:21][C:22]([C:24]4[CH:25]=[CH:26][C:27]([C:28]([OH:30])=[O:29])=[CH:32][CH:33]=4)=[O:23])[C:17]([CH3:20])=[C:18]([CH3:19])[C:13]=3[O:12][C:11]2([CH3:36])[CH3:35])=[CH:8][CH:9]=1)([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 21961308HCID 21961308, compound

Product 1

HCID 21961347HCID 21961347, compoundYield 60%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of methyl 4-[[3-(4-isopropylphenyl)-2,2,4,6,7-pentamethyl-2,3-dihydro-1-benzofuran-5-ylamino]carbonyl]benzoate (341.7 mg, 0.70 mmol) in a mixed solvent of tetrahydrofuran (10 ml) and methanol (2.5 ml) was added a 1 N aqueous solution of sodium hydroxide (0.75 ml, 0.75 mmol) and the resulting mixture was stirred at room temperature for 3 hours. The reaction mixture was concentrated under reduced pressure and 1N hydrochloric acid was added into the residue. The product was extracted twice with ethyl acetate. The combined extracts were dried on magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was crystallized from ethyl acetate-hexane to obtain the title compound (60% yield) Melting point: 258-261° C.

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure and 1N hydrochloric acid
  2. additionwas added into the residue
  3. extractionThe product was extracted twice with ethyl acetate
  4. customThe combined extracts were dried on magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was crystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-4454114f135b4403be060b9599271ef4
Source dataset
uspto-grants-2002_11
Patent number
US06479536B1

Reaction notes

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