Reaktionsgleichung
[CH3:1][C@H:2]([CH2:9][CH2:10][CH:11]=[C:12]([CH3:14])[CH3:13])[CH2:3]/[CH:4]=[CH:5]/[C@H:6]([OH:8])[CH3:7].[C:15]([O-])(=[O:19])[CH2:16]CC.C(OC(=O)C)(=O)C.N1C=CC=CC=1>>[C:15]([O:8][C@@H:6](/[CH:5]=[CH:4]/[CH2:3][C@H:2]([CH3:1])[CH2:9][CH2:10][CH:11]=[C:12]([CH3:14])[CH3:13])[CH3:7])(=[O:19])[CH3:16]Komponenten
5
Versuchsvorschrift
A flame-dried 100 mL, three-necked flask with magnetic stirring bar was charged under argon with 2.0 g (10.2 mmol) of (2R,3E,6R)-6,10-dimethyl-3,9-undecadien-2-ol [(2R,6R)/(2S,6R)=90:10 by GC diastereomer analysis of butyrate derivative]. Then, after cooling in an ice-bath, 1.5 g (1.4 mL, 15 mmol) of acetic anhydride, 1.58 g (1.6 mL, 20 mmol) of dry pyridine and 12.3 mg (0.1 mmol) of 4-N,N-dimethylaminopyridine were added, and the reaction was stirred for 75 minutes at ambient temperature. Work-up as described in Example 9 followed by Kugelrohr distillation at ca. 110°/0.25 mm afforded 2.35 g (99%) of (2R,3E,6R)-6,10-dimethyl-3,9-undecadien-2-ol acetate as colorless liquid; GC purity 90%; [α]D25 =+47.17° (5.3% in CHCl3).
Aufarbeitung
- temperatureThen, after cooling in an ice-bath
- distillationfollowed by Kugelrohr distillation at ca. 110°/0.25 mm
Quellen und Nachweise
- ORD-Eintrag
- ord-c7c77e79240c409886ff0bef14cb9967
- Quelldatensatz
- uspto-grants-1988_12
- Patentnummer
- US04789750
Verknüpfte Notizen
Wird geladen…