Reaktion #65576

Reaktionsgleichung

cyclododecane methanol

TEMPO

sodium bromide

sodium hypochlorite

sodium bicarbonate

→

crude title compound

Ausbeute 96.1%

Cyclododecanecarboxaldehyde

Ausbeute 96.1%

Lösungsmittel

methylene chloride

methylene chloride

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe solution is cooled to 10°-15° C.
2. 2
   WaschenThe organic phase is washed with aqueous sodium thiosulfate, aqueous bicarbonate and water
3. 3
   TrocknenThe methylene chloride layer is dried over magnesium sulfate
4. 4
   Filtrationfiltered
5. 5
   Sonstigeevaporated in vacuo

Vorschrift

To a solution of 9.92 g (50 mmol) of cyclododecane methanol in 100 ml of methylene chloride under a nitrogen atmosphere is added 50 mg of 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical (TEMPO) and 510 mg (5 mmol) of sodium bromide in 5 ml of water. The solution is cooled to 10°-15° C. and a solution of 100 ml of 5.25% aqueous sodium hypochlorite and 2.0 g of sodium bicarbonate is added over 1 hour. The reaction mixture is allowed to warm to room temperature and after 1 hour is diluted with methylene chloride. The organic phase is washed with aqueous sodium thiosulfate, aqueous bicarbonate and water. The methylene chloride layer is dried over magnesium sulfate, filtered and evaporated in vacuo to give 9.43 g of crude title compound as an oil: IR (film) 1723 cm-1 ; NMR (CDCl3)) δ 1.34 (bs, 18H), 1.41 (m, 4H), 1.54 (m, 2H), 1.65 (m, 2H), 2.40 (m, 1H), 9.64 (d, 1H, J=1.6 Hz) M+ (EI) 196.

Quelle