Реакция #55916

Уравнение реакции

dichloromethane

4-Hydroxy-3-(2-hydroxy-1,1-dimethylethyl)phenyl methanesulphonate

4-hydroxy-3-(2-hydroxy-1,1-dimethylethyl)phenyl methanesulphonate

triethylamine

ethyl phosphorodichloridate

→

desired product

Выход 44.6%

2-Ethoxy-4,5-dihydro-5,5-dimethyl-2-oxo-1,3,2-benzodioxaphosphepin-7-yl methanesulphonate

Выход 44.6%

Растворители

acetonitrile

Условия реакции

Обработка

1. 1
   ТемператураThe mixture was cooled in ice
2. 2
   Промывкаafter which the solution was washed with water, dilute sodium hydroxide solution and water again
3. 3
   Сушкаdried over magnesium sulphate
4. 4
   ДругоеThe crude product was recrystallised from toluene

Методика

4-Hydroxy-3-(2-hydroxy-1,1-dimethylethyl)phenyl methanesulphonate (10 g) from Example 1 was suspended in acetonitrile (100 ml) and triethylamine (8 g) was added. The mixture was cooled in ice, and ethyl phosphorodichloridate (6.9 g) was added dropwise with vigorous stirring. Stirring was continued for 6 hours prior to the addition of dichloromethane (200 ml), after which the solution was washed with water, dilute sodium hydroxide solution and water again, dried over magnesium sulphate and run down. The crude product was recrystallised from toluene, yielding 6.0 g of the desired product, melting point 113°-115° C.

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