Reaktion #65578

Reaktionsgleichung

water

methyl 3-cyclododecylpropanoate

sodium hydroxide

→

title compound

3-(3-Cyclododecyl-1-oxopropyl)-4-hydroxy-2(5H)-furanone

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturis maintained for 4 hours
2. 2
   Extraktionis extracted with hexane
3. 3
   Extraktionis extracted (2 times) with ethyl ether
4. 4
   WaschenThe combined ethereal extracts are washed with 1N hydrochloric acid
5. 5
   Trocknenare dried over magnesium sulfate
6. 6
   FiltrationFiltration and evaporation
7. 7
   Sonstigegives 7.48 g of crude title compound
8. 8
   SonstigeRecrystallization of a portion of the product from hexane

Vorschrift

To a solution of 7.6 g (30 mmol) of methyl 3-cyclododecylpropanoate in 100 ml of methanol is added 2.4 g of sodium hydroxide. The mixture is heated to 55° C. and is maintained for 4 hours. The reaction mixture is diluted with water and is extracted with hexane. The aqueous phase is acidified with 1N hydrochloric acid and is extracted (2 times) with ethyl ether. The combined ethereal extracts are washed with 1N hydrochloric acid and are dried over magnesium sulfate. Filtration and evaporation gives 7.48 g of crude title compound. Recrystallization of a portion of the product from hexane gives 1.81 g of the title compound: m.p. 72°-74° C.; IR (KBr) 1715 cm-1 ; NMR (CDCl3) δ 1.34 (m, 23H), 1.57 (q, 2H, J=8 Hz), 2.36 (t, 2H, J=8 Hz). Anal. Calc'd. for C15H28O2 : C, 74.95;H, 11.74; Found: C, 74.90;H, 11.20.

Quelle