4-Nitrobenzaldehyde → 1-(4-Nitrophenyl)2-nitro-heptan-1-ol

Beteiligte Stoffe

Reaktionsschritte

n-BuLi (1.6 M in hexane, 6.24 mL) was added dropwise with stirring to a solution of nitrohexane (1.4 mL, 10 mmol) in THF (12 mL) at -78° C. After 15 minutes a solution of TiCl3 (OPriso) (5 mmol) in THF (2 mL) and CH2Cl2 (3 mL) solution was added. After a further 15 minutes 4-nitrobenzaldehyde (0.75 mL, 5 mmol) in CH2Cl2 (3 mL) was added and the mixture allowed to warm up to room temperature (18 30 min.). Stirring was continued for a further 3.5 hours at room temperature and the mixture was quenched with an aqueous slurry of disodium EDTA (1.86 g, 5 mmol) and extracted with Et2O (3×75 mL), aqueous sodium bicarbonate (75 mL) and water (75 mL), dried and evaporated in vacuo. Flash column chromatography [SiO2, hexane:Et2O, 4:1 v/v] gave 1-(4-nitrophenyl)2 -nitro-heptan-1-ol (1.13 g, 81% Erythro:threo ratio 3.9:1

Herkunft & Nachweise