Reaktion #1787612

Reaktionsgleichung

5-phenylcyclohexane-1,3-dione

3-aminopropan-2-ol

tetrahydrofuran

→

3-methyl-6-(2-methylphenyl)-4,5,6,7-tetrahydroindol-4-one

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas refluxed for 12 hours
2. 2
   Temperaturcooled
3. 3
   Filtrationinsoluble materials were filtered off
4. 4
   SonstigeUnder reduced pressure, the solvent was evaporated
5. 5
   workup.DISSOLUTIONthe residue was dissolved in dimethylformamide (40 ml)
6. 6
   workup.ADDITIONTo the mixture were added 2-bromomesitylene (2.0 g), tetrakistriphenylphosphine palladium (0.29 g) and potassium carbonate (2.7 g)
7. 7
   Einengenconcentrated under reduced pressure
8. 8
   workup.DISSOLUTIONThe residue was dissolved in ethyl acetate
9. 9
   Waschenthe solution was washed with sodium hydrogen carbonate solution, water and saturated brine
10. 10
    Trocknendried with magnesium sulfate
11. 11
    Einengenconcentrated under reduced pressure
12. 12
    SonstigeThe residue was recrystallized from ethyl acetate-hexane

Vorschrift

A mixture of 5-phenylcyclohexane-1,3-dione (2.0 g), 3-aminopropan-2-ol (0.97 g), molecular sieves 4A (12 g) and tetrahydrofuran (30 ml) was refluxed for 12 hours and cooled, and insoluble materials were filtered off. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in dimethylformamide (40 ml). To the mixture were added 2-bromomesitylene (2.0 g), tetrakistriphenylphosphine palladium (0.29 g) and potassium carbonate (2.7 g), and the mixture was stirred at 150° C. for 5 hours and concentrated under reduced pressure. The residue was dissolved in ethyl acetate, and the solution was washed with sodium hydrogen carbonate solution, water and saturated brine, dried with magnesium sulfate and concentrated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give colorless crystals of 3-methyl-6-(2-methylphenyl)-4,5,6,7-tetrahydroindol-4-one (1.1 g).

Quelle