3,7-Dimethylocta-2,6-Dienal → 4,8-Dimethylnona-3,7-dien-2-ol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Methyl lithium in tetrahydrofuran (THF) (1.6 L, 1 M) was charged to a flame dried 3 L reaction flask equipped with a thermometer, a mechanical stirrer, condenser, and an addition funnel. Citral was added dropwise for over 2-2.5 hours. The reaction mixture was aged until the conversion rate was greater than 90%. The reaction mixture was cooled to lower than 30° C. and quenched by the slow addition of HCl (pH<5.10%). The aqueous phase was extracted three times with toluene (100 mL) and the extracts were added to the crude reaction mixture. The crude reaction mixture was then washed with saturated sodium bicarbonate (500 mL) followed by saturated salt solution and dried over anhydrous sodium sulphate. The crude reaction mixture was concentrated. The solvents were recovered via a rotary evaporator to provide 8-hydroxy-2,6-dimethyl-nona-2,6-diene.

Herkunft & Nachweise