Réaction #7919

Équation de réaction

Potassium hydroxide

5-methoxy-1-indanone

butyraldehyde

→

2-butyl-5-methoxy-1-indanone

Rendement 104.1%

Solvants

ethanol

Conditions de réaction

Traitement

1. 1
   FiltrationThe mixture was filtered
2. 2
   Autrethe filtrate evaporated under vacuum
3. 3
   AutreThe residue was partitioned between EtOAc (200 mL) and water (200 mL)
4. 4
   workup.ADDITIONcontaining 2N HCl (5 mL)
5. 5
   LavageThe organic phase was washed with brine (100 mL)
6. 6
   Séchagedried over MgSO4
7. 7
   Filtrationfiltered
8. 8
   Autreevaporated under vacuum

Mode opératoire

Potassium hydroxide (0.44 g, 85% weight pure, 6.67 mmol) and 10% palladium on activated carbon (0.42 g) were added to a mixture of 5-methoxy-1-indanone (5.0 g, 30.8 mmol) and butyraldehyde (3.3 mL, 37 mmol) in ethanol (30 mL). The resulting mixture was stirred under an atmosphere of hydrogen at room temperature for 2 hours. The mixture was filtered and the filtrate evaporated under vacuum. The residue was partitioned between EtOAc (200 mL) and water (200 mL) containing 2N HCl (5 mL). The organic phase was washed with brine (100 mL), dried over MgSO4, filtered, and evaporated under vacuum to afford crude 2-butyl-5-methoxy-1-indanone (7.0 g) as an oil.

Source