反应详情

温度

-40 °C

Methyltriphenylphosphonium bromide (6.9 g, 0.019M) was suspended in dry tetrahydrofuran (100 ml) at -40° C. under an atmosphere of dry nitrogen. n-Butyllithium (13.5 ml. of a 1.55M solution in hexane, 0.021M) was added dropwise during 10 minutes and the mixture was stirred at -40° C. for 30 minutes. 3-Chloro-2-methylbenzaldehyde (3.0 g, 0.019M) in dry tetrahydrofuran (10 mls) was then added. The mixture was maintained at -40° C. for 30 minutes and then allowed to warm to room temperature. Hexane (150 ml) was added and the mixture was filtered. The hexane was evaporated to give crude 3-chloro-2-methylstyrene which was used directly without further purification.

1. temperatureThe mixture was maintained at -40° C. for 30 minutes
2. temperatureto warm to room temperature
3. filtrationthe mixture was filtered
4. customThe hexane was evaporated