反应详情

2.1 g of the compound obtained in Example 5 are dissolved in 50 ml of chloroform and treated slowly at 0° with a solution of 1.2 g of m-chloroperbenzoic acid (90%) in 10 ml of chloroform. After stirring at 0° for 20 hours the mixture is washed with dilute soda solution and water, dried and evaporated. The thus-obtained yellow oil is filtered over a small silica gel column (eluting agent hexane/ethyl acetate=1:2) and recrystallized from ethyl acetate. There are obtained 1.7 g of methyl 2-[p-[(E)-2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl)propenyl]phenoxy]ethyl sulphoxide, melting point 134°-136°.

1. washis washed
2. additionwith dilute soda solution and water
3. customdried
4. customevaporated
5. filtrationThe thus-obtained yellow oil is filtered over a small silica gel column (eluting agent hexane/ethyl acetate=1:2)
6. customrecrystallized from ethyl acetate