Methanol → Tert-butyl 3-(acetyloxy)tetradecanoate

Reaktionsgleichung

[OH:1][CH:2]([CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])[CH2:3][C:4]([O:6][C:7]([CH3:10])([CH3:9])[CH3:8])=[O:5].[C:22](OC(=O)C)(=[O:24])[CH3:23].CO>N1C=CC=CC=1>[C:22]([O:1][CH:2]([CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])[CH2:3][C:4]([O:6][C:7]([CH3:8])([CH3:9])[CH3:10])=[O:5])(=[O:24])[CH3:23]

Komponenten

Versuchsvorschrift

To a solution of t-butyl (3RS)-3-hydroxytetradecanoate (20.0 g) in dry pyridine (100 ml) was added acetic anhydride (7.8 ml) at ambient temperature. The mixture was stirred at the same temperature overnight. Acetic anhydride (3 ml) was added to the mixture. The mixture was stirred for additional 2 hours at the same temperature. To the mixture was added methanol (50 ml) under ice-cooling. The mixture was concentrated under reduced pressure. The residue was dissolved in ethyl acetate. The organic solution was washed with 1N hydrochloric acid and saturated aqueous sodium chloride, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by a column chromatography on silica gel (400 g) (chloroform:methanol 100:1 V/V) to give t-butyl (3RS)-3-acetoxytetradecanoate (14.04 g).