反应详情

温度

0 °C

Borane-dimethyl sulphide complex (2.0M in THF, 7.67 ml, 15.3 mmol) was added dropwise to 2-vinylbenzaldehyde ethylene acetal (2.7 g, 15.3 mmol) in THF (80 ml) at 0° C. Stirring was continued at room temperature for 4 h, cooled to 0° C. and 10% aqueous sodium hydroxide (3 ml) added dropwise, followed by hydrogen peroxide (30% by volume, 1.8 ml). After 1 h at room temperature, the mixture was diluted with water, extracted with ethyl acetate, dried over sodium sulphate and evaporated to give a colourless viscous gum (2.2 g), MS (+EI) 194 (M+), 1H NMR (CDCl3) 7.48 (1H, d, J6 Hz), 7.3-7.1 (3H, m), 5.91 (1H, s), 4.1-3.9 (4H, m), 3.78 (2H, t, J6.5 Hz), 2.93 (2H, t, J6.5 Hz).

1. waitAfter 1 h at room temperature
2. extractionextracted with ethyl acetate
3. dry with materialdried over sodium sulphate
4. customevaporated