2,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzylidene)-1H-inden-1-one → 2,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzyl)-1H-inden-1-one

HRID 2232198Notes

Reaction equation

HRID 2232198 reaction equation
[CH3:1][C:2]1[CH:10]=[C:9]([CH3:11])[C:8]([OH:12])=[C:7]2[C:3]=1[CH2:4][C:5](=[CH:14][C:15]1[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][CH:16]=1)[C:6]2=[O:13].[H][H]>C(OCC)(=O)C.C(O)(=O)C.[Pd]>[CH3:1][C:2]1[CH:10]=[C:9]([CH3:11])[C:8]([OH:12])=[C:7]2[C:3]=1[CH2:4][CH:5]([CH2:14][C:15]1[CH:16]=[CH:17][C:18]([O:21][CH3:22])=[CH:19][CH:20]=1)[C:6]2=[O:13]

Participants

6

Reactant 2

HCID 544635462,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzylidene)-1H-inden-1-oneHCID 178418361HCID 178418361, compound

Product 1

HCID 148347332,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzyl)-1H-inden-1-one

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Procedure

16.09 Grams of 2,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzylidene)-1H-inden-1-one was dissolved in a mixed solvent of 150 ml of ethyl acetate with 100 ml of acetic acid, this solution was let subjected to catalytic reduction at room temperature under 3 atmospheric hydrogen gas pressure in the presence of 1.5 g of palladium black as the hydrogenation catalyst. After the catalytic reduction, the catalyst was removed by filtration, and the filtrate was concentrated by removing the solvent under reduced pressure. The residue thus obtained was purified by a silica gel column chromatography (eluent: n-hexane: ethyl acetate =9:1) to obtain 8.5 g of 2,3-dihydro-4,6-dimethyl-7-hydroxy-2-(4-methoxybenzyl)-1H-inden-1-one as in the form of colorless oily substance.

Workup

  1. customAfter the catalytic reduction, the catalyst was removed by filtration
  2. concentrationthe filtrate was concentrated
  3. customby removing the solvent under reduced pressure
  4. customThe residue thus obtained
  5. customwas purified by a silica gel column chromatography (eluent: n-hexane: ethyl acetate =9:1)

Sources & evidence

ORD record
ord-a13a06b57e5040cbbd66b13aa582a287
Source dataset
uspto-grants-1988_11
Patent number
US04788130

Reaction notes

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