Реакция #84034

Уравнение реакции

2,2-dibromo-1-(6-bromonaphthalen-2-yl)ethanone

triethylamine

diethyl phosphite

→

2-bromo-1-(6-bromonaphthalen-2-yl)ethanone

Выход 97.0%

Растворители

tetrahydrofurane

Условия реакции

Обработка

1. 1
   ФильтрацияThe reaction mixture was filtrated
2. 2
   Другоеthe solvent was removed in vacuum
3. 3
   workup.DISSOLUTIONThe obtained residue was dissolved in ethyl acetate (1.2 L)
4. 4
   Промывкаwashed with water
5. 5
   ДругоеThe organic layer was separated
6. 6
   Сушкаdried over sodium sulphate
7. 7
   Фильтрацияfiltrated
8. 8
   Концентрированиеconcentrated

Методика

2,2-dibromo-1-(6-bromonaphthalen-2-yl)ethanone (90.0 g, 221 mmol, 1.00) was dissolved in tetrahydrofurane (800 mL), triethylamine (27.67 mL, 199 mmol, 0.9 equiv.) was added followed by diethyl phosphite (45.8 g, 332 mmol, 1.50 equiv.). The reaction mixture was stirred overnight. The reaction mixture was filtrated and the solvent was removed in vacuum. The obtained residue was dissolved in ethyl acetate (1.2 L) and washed with water. The organic layer was separated, dried over sodium sulphate, filtrated and concentrated to yield crude 2-bromo-1-(6-bromonaphthalen-2-yl)ethanone (70.3 g). Recrystallization from acetonitrile gave 30 g (first batch) and 6.5 g (second batch) of 2-bromo-1-(6-bromonaphthalen-2-yl)ethanone (50%)

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