Reaktion #517222

Reaktionsgleichung

methyl 2-trifluoromethanesulfonyloxy-1-naphthoate

triethylamine

Diphenylphosphine

→

Methyl 2-diphenylphosphino-1-naphthoate

Lösungsmittel

acetonitrile

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigegiving a red coloration
2. 2
   TemperaturThe solution was heated
3. 3
   Temperaturat reflux under nitrogen for 17 hours
4. 4
   Temperaturto cool
5. 5
   Einengenconcentrated under reduced pressure to approximately half its original volume
6. 6
   workup.ADDITIONMethanol (50 ml) was added
7. 7
   Einengenthe mixture concentrated a little more under reduced pressure
8. 8
   SonstigeThe product crystallised from this mixture
9. 9
   Filtrationwas collected by filtration
10. 10
    Waschenwashed with ice-cold methanol (200 ml)
11. 11
    Sonstigedried under vacuum at ambient temperature

Vorschrift

A stirred solution of methyl 2-trifluoromethanesulfonyloxy-1-naphthoate (52.7 g, 158 mmol, 1 eq), triethylamine (26.5 ml, 190 mmol, 1.2 eq) and palladium acetate (0.15 g, 0.7 mmol, 0.004 eq) in acetonitrile (600 ml) was sparged with nitrogen for 30 minutes. Diphenylphosphine (29.4 g, 158 mmol, 1 eq) was added instantly giving a red coloration. The solution was heated at reflux under nitrogen for 17 hours. The blood-red solution was allowed to cool and concentrated under reduced pressure to approximately half its original volume. Methanol (50 ml) was added and the mixture concentrated a little more under reduced pressure. The product crystallised from this mixture and was collected by filtration and washed with ice-cold methanol (200 ml) and dried under vacuum at ambient temperature; 31p NMR (162 mHz; CDCl3): δ−7.8. Yield 54.1 g, 92%

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