2,6-Dimethyl-4-pyranone → Tetrahydro-2,6-dimethyl-4H-pyran-4-one

HRID 1033088Notes

Reaction equation

HRID 1033088 reaction equation
[CH3:1][C:2]1[O:8][C:7]([CH3:9])=[CH:6][C:4](=[O:5])[CH:3]=1>CCO>[CH3:9][CH:7]1[CH2:6][C:4](=[O:5])[CH2:3][CH:2]([CH3:1])[O:8]1

Participants

3

Reactant 1

HCID 138622,6-Dimethyl-4-pyranone

Product 1

HCID 70626Tetrahydro-2,6-dimethyl-4H-pyran-4-one

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of 2,6-dimethyl-γ-pyrone (17 g, Aldrich) in 300 mL of EtOH 95% was hydrogenated for 3 days under 70 psi. After filtration over celite, the solvent was evaporated and replaced by CH2Cl2. The solution was then treated with celite (30 g) and PCC (48.5 g). The suspension was stirred for 3 hr. and the reaction was diluted with Et2O (300 mL) and then filtered over a pad celite. The filtrate was evaporated to dryness and the residual solution was then chromatographed using hexane/Et2O (1:1) to give the title compound.

Workup

  1. filtrationAfter filtration over celite
  2. customthe solvent was evaporated
  3. additionThe solution was then treated with celite (30 g) and PCC (48.5 g)
  4. additionand the reaction was diluted with Et2O (300 mL)
  5. filtrationfiltered over a pad celite
  6. customThe filtrate was evaporated to dryness
  7. customthe residual solution was then chromatographed

Sources & evidence

ORD record
ord-7e57b71c8c02462b8ac853a722cff055
Source dataset
uspto-grants-1994_05
Patent number
US05308852

Reaction notes

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