Reaktion #7938

Reaktionsgleichung

2-propanethiol

9a-butyl-4-(4-hydroxy-phenyl)-7-methoxy-1,2,9,9a-tetrahydro-3H-fluoren-3-one

AlCl3

HCl

→

9a-BUTYL-7-HYDROXY-4-(4-HYDROXYPHENYL)-1,2,9,9a-TETRAHYDRO-3H-FLUOREN-3-ONE

Lösungsmittel

CH2Cl2

EtOAc

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigecontained in an ice cooled flask
2. 2
   workup.STIRRINGThe resulting mixture was stirred at 0° C. for 5 minutes and at room temperature for 3.25 hours
3. 3
   workup.STIRRINGstirred for 15 minutes at room temperature
4. 4
   SonstigeThe EtOAc layer was separated
5. 5
   Waschenwashed with 1N HCl and brine
6. 6
   Trocknendried over MgSO4
7. 7
   Filtrationfiltered
8. 8
   Sonstigeevaporated under vacuum
9. 9
   Sonstigeto give a yellow gum
10. 10
    SonstigeThis material was triturated with benzene
11. 11
    Sonstigeto give
12. 12
    Filtrationafter filtration
13. 13
    Trocknendrying under vacuum, 9a-butyl-7-hydroxy-4-(4-hydroxyphenyl)-1,2,9,9a-tetrahydro-3H-fluoren-3-one as an off-white solid

Vorschrift

An ice-cold solution of 9a-butyl-4-(4-hydroxy-phenyl)-7-methoxy-1,2,9,9a-tetrahydro-3H-fluoren-3-one (29 mg, 0.08 mmol) in anhydrous CH2Cl2 (1 mL) was added to AlCl3 (96 mg, 0.72 mmol) contained in an ice cooled flask. The mixture was stirred at 0° C. under a nitrogen atmosphere and treated with 2-propanethiol (0.056 mL, 0.6 mmol). The resulting mixture was stirred at 0° C. for 5 minutes and at room temperature for 3.25 hours, then treated with ice (approx. 2 mL), 2N HCl (2 mL) and EtOAc (4 mL) and stirred for 15 minutes at room temperature. The EtOAc layer was separated, washed with 1N HCl and brine, dried over MgSO4, filtered, and evaporated under vacuum to give a yellow gum. This material was triturated with benzene to give, after filtration and drying under vacuum, 9a-butyl-7-hydroxy-4-(4-hydroxyphenyl)-1,2,9,9a-tetrahydro-3H-fluoren-3-one as an off-white solid.

Quelle