Reaktion #9799

Reaktionsgleichung

9-bromoanthracene

bromophenol

→

Anthracene

Lösungsmittel

hexane

Et2O

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe reaction was stirred
2. 2
   Temperaturwarmed to RT over 30 min
3. 3
   SonstigeThe volatiles were removed under N2
4. 4
   Sonstigepurge
5. 5
   workup.DISSOLUTIONthe residue was redissolved in 3:1 THF/NMP (11 mL)
6. 6
   Temperaturthe reaction was heated to 100° C. for 2 h
7. 7
   TemperaturThe reaction was cooled to RT
8. 8
   Sonstigethe THF was removed
9. 9
   workup.ADDITIONThe residue was diluted with CH2Cl2
10. 10
    Waschenwashed with 1 M HCl
11. 11
    Trocknendried over Na2SO4
12. 12
    SonstigeThe crude material was purified by flash chromatography

Vorschrift

A solution of 9-bromoanthracene (0.67 g, 2.6 mmol, 1.2 eq) in dry Et2O (13 mL) under N2 was cooled to −30° C. and nBuli (1.6 M in hexane, 1.6 mL, 2.6 mmol, 1.2 eq) was added dropwise. The solution was stirred for 20 min. at −30° C. followed by dropwise addition of ZnCl2 (0.50 M in THF, 5.2 mL, 2.6 mmol, 1.2 eq). The reaction was stirred and warmed to RT over 30 min. The volatiles were removed under N2 purge and the residue was redissolved in 3:1 THF/NMP (11 mL). The MOM-protected bromophenol (2.2 mmol, 1.0 eq) and Pd(PtBu3)2 (22 mg, 44 μmol, 4 mol %) were added and the reaction was heated to 100° C. for 2 h. The reaction was cooled to RT and the THF was removed. The residue was diluted with CH2Cl2, washed with 1 M HCl, and dried over Na2SO4. The crude material was purified by flash chromatography.

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