Hydrochloric Acid → (R)-7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoic acid

HRID 1707815Notes

Reaction equation

HRID 1707815 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C@H:8]([C:18]2[C:23]([OH:24])=[C:22]([CH3:25])[C:21]([CH3:26])=[C:20]([CH:27]=[O:28])[C:19]=2[CH3:29])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([O:16]C)=[O:15])=[CH:4][CH:3]=1.[OH-].[Na+].Cl>O1CCCC1>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C@H:8]([C:18]2[C:23]([OH:24])=[C:22]([CH3:25])[C:21]([CH3:26])=[C:20]([CH:27]=[O:28])[C:19]=2[CH3:29])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15])=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 10644683methyl (R)-7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoate

Product 1

HCID 10524208(R)-7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoic acidYield 90.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of methyl (R)-7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoate (0.55 g, 1.4 mmol) in tetrahydrofuran (6 ml) was added, under argon atmosphere, 1N sodium hydroxide (2.9 ml). The mixture was stirred for 14 hours at room temperature, to which was added 1N hydrochloric acid (2.9 ml), followed by extraction with ethyl acetate. The organic layer was washed with water and a saturated aqueous saline solution, which was dried over magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was recrystallized from acetonitrile to give (R)-7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoic acid (0.49 g). Physico-chemical properties and spectral data of this product were shown in [Table 4]. Likewise, Compounds 26, 28, 30 and 31 were prepared.

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with water
  3. dry with materiala saturated aqueous saline solution, which was dried over magnesium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customThe residue was recrystallized from acetonitrile

Sources & evidence

ORD record
ord-30056d7a3e6a436db74aeee812966557
Source dataset
uspto-grants-1994_10
Patent number
US05354913

Reaction notes

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