tert-Butyl hydroperoxide → HCID 10856043, Verbindung
Reaktionsgleichung
C([O:5]O)(C)(C)C.[C:7]1([CH2:13][CH2:14][CH:15]=[CH:16][CH2:17][OH:18])[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1>>[O:5]1[C@@H:15]([CH2:14][CH2:13][C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[C@@H:16]1[CH2:17][OH:18]Komponenten
3
Reaktionsbedingungen
- Temperatur
- -20 °C
Versuchsvorschrift
To a 1L 3-neck round-bottom flask equipped with a mechanical stirrer, thermocouple and nitrogen inlet was added CH2C12 (350 mL), dried 4 Å molecular sieves (30 g) and L-(+)-diethyl tartrate (7.62 g, 0.037 mol). The resulting mixture was cooled to -20° C. and treated with Ti(O-i-Pr)4 (9.2 mL, 0.031 mol), followed by the addition of t-butylhydroperoxide (4.0 M in CH2Cl2, 182 mL, 0.78 mol) at a rate to maintain the temperature 2 -20° C. Upon complete addition, the reaction mixture was stirred for another 30 min, and then treated with a solution of the allylic alcohol (15) (50 g, 0.31 mol) in CH2C12 (30 mL) at a rate to maintain the temperature at -20° C. The reaction was stirred at the same temperature for 5 h, then filtered into a solution of ferrous sulfate heptahydrate (132 g) and tartaric acid (40 g) in water (400 mL) at 0° C. The mixture was stirred for 20 min, then transferred to a separatory funnel and extracted with t-BuOMe (2×200 mL). The combined organic phase was stirred with 30% NaOH solution containing NaCi, for 1 h at 0° C. The layers were again separated, and the aqueous phase extracted with t-BuOMe. The combined organic phase was washed with brine, dried over MgSO4 and concentrated to yield the title compound (52.8 g) as an amber oil.