Реакция #166176

Уравнение реакции

8-(1,1′-binaphthyl-2-yl)-7,7,9,9-tetramethyl-1,4-dioxa-8-phosphaspiro[4.5]decane

triethylamine

bromobenzene

diethylphosphite

→

Diethyl phenylphosphonate

Выход 59.0%

Растворители

ethanol

Условия реакции

Обработка

1. 1
   ДругоеIn a nitrogen-atmosphere glovebox, a microwave vial equipped with a magnetic stir bar
2. 2
   ДругоеThe vial was sealed with a crimp top
3. 3
   Другоеthe vial was removed from the heating block
4. 4
   Температураcooled to room temperature
5. 5
   workup.ADDITIONThe reaction solution was diluted with tetrahydrofuran (2 mL)
6. 6
   Фильтрацияfiltered into a tared 125-mL Erlenmeyer flask
7. 7
   ПромывкаThe vial was rinsed with tetrahydrofuran (5×1 mL)
8. 8
   Промывкаby washing of the filter cake with tetrahydrofuran (5 mL)

Методика

In a nitrogen-atmosphere glovebox, a microwave vial equipped with a magnetic stir bar was charged with palladium(II) acetate (1.4 mg, 0.00637 mmol, 0.02 equivalents), 8-(1,1′-binaphthyl-2-yl)-7,7,9,9-tetramethyl-1,4-dioxa-8-phosphaspiro[4.5]decane (3.6 mg, 0.00764 mmol, 0.024 equivalents) and ethanol (0.64 mL). To the slurry were added triethylamine (67 μL, 0.478 mmol, 1.5 equivalents), bromobenzene (34 μL, 0.318 mmol, 1 equivalent) and diethylphosphite (49 μL, 0.382 mmol, 1.2 equivalents). The vial was sealed with a crimp top and stirred at 80° C. After 24 hours, the vial was removed from the heating block, cooled to room temperature and brought out of the glovebox. The reaction solution was diluted with tetrahydrofuran (2 mL) and filtered into a tared 125-mL Erlenmeyer flask. The vial was rinsed with tetrahydrofuran (5×1 mL), followed by washing of the filter cake with tetrahydrofuran (5 mL). A wt % analysis was performed on the filtrate and an assay yield of 59% was measured versus commercially available diethyl phenylphosphonate.

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