反应详情

温度

13.5 °C

To a solution of 2-methyl-3-(4-methylphenyl)-2-propen-1-ol (750 g) in toluene (2367 ml) was added dimethylformamide (29.6 ml). To the solution was added dropwise thionyl chloride (431.1 ml) at 20° C. or below and the solution was stirred at 12 to 15° C. for 1.5 hr. Water was then added thereto under ice-cooling. The toluene layer was fractionated and a 10% aqueous solution of sodium carbonate was added thereto to adjust the pH to 5. The toluene layer was fractionated again, washed successively with 5% sodium hydrogencarbonate and 5% brine. The solvent was distilled off to give the title compound as an oil (776.8 g, yield 87.3%).

1. temperatureunder ice-cooling
2. washwashed successively with 5% sodium hydrogencarbonate and 5% brine
3. distillationThe solvent was distilled off