Reaktion #2362412

Reaktionsgleichung

4-bromo-8-methoxy-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

hydrochloric acid

sodium hydroxide

X-phos

CHCl3

→

title compound

Ausbeute 64.2%

4-Hydroxy-8-methoxy-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

Ausbeute 64.2%

Lösungsmittel

water

dioxane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with ethyl acetate
2. 2
   Waschenwashed with saturated brine
3. 3
   Trocknendried over sodium sulfate
4. 4
   Filtrationfiltered
5. 5
   SonstigeThe residues obtained
6. 6
   Einengenafter concentration under reduced pressure
7. 7
   Sonstigewere purified by silica gel column chromatography (ethyl acetate/hexane)
8. 8
   Waschenwashed with dichloromethane

Vorschrift

Under nitrogen atmosphere, 4-bromo-8-methoxy-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile (Compound U5, 10.0 mg, 25.30 μmol), X-phos (1.07 mg, 2.530 μmol), sodium hydroxide (4.36 mg, 75.90 μmol) and Pd2dba3.CHCl3 (1.31 mg, 1.265 μmol) were dissolved in dioxane (0.50 mL) and water (0.50 mL) and the mixture was stirred at 100° C. for 1 hr. The reaction solution was poured into hydrochloric acid (1 M), extracted with ethyl acetate, washed with saturated brine, dried over sodium sulfate, and then filtered. The residues obtained after concentration under reduced pressure were purified by silica gel column chromatography (ethyl acetate/hexane) and washed with dichloromethane to obtain the title compound (5.4 mg, 64%).

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