反应详情

温度

-60 °C

A Grignard reagent which was conventionally prepared using 24.3 g (1 mol) of magnesium, 203.2 g (1.1 mol) of 4-tert-butoxyphenyl chloride, and 280 g of THF was diluted with 500 g of THF and cooled to lower than -60° C. in a dry ice/methanol bath. Then 47.5 g (0.4 mol) of thionyl chloride diluted with 70 g of THF was added dropwise over 1 hour at less 0° C. After ripening for 1 hour in an ice bath, 36 g of water was added to decompose the excess of Grignard reagent. Separation was carried out by adding 1,000 g of methylene chloride and further 400 g of saturated ammonium chloride aqueous solution and 300 g of water. The organic layer was washed twice with 700 g of pure water. The organic layer was dried over magnesium sulfate and filtered and then evaporated. The resulting oily residue was recrystallized, isolating bis(4-tert-butoxyphenyl) sulfoxide in a yield of 60%.

1. additionwas added dropwise over 1 hour at less 0° C
2. customSeparation
3. additionby adding 1,000 g of methylene chloride and further 400 g of saturated ammonium chloride aqueous solution and 300 g of water
4. washThe organic layer was washed twice with 700 g of pure water
5. dry with materialThe organic layer was dried over magnesium sulfate
6. filtrationfiltered
7. customevaporated
8. customThe resulting oily residue was recrystallized