Реакция #2045078

Уравнение реакции

dibenzo[b,d]thiophen-4-yl lithium

m-bromophenyl lithium

n-butyllithium

hexane

1,3-dibromobenzene

m-bromophenyl lithium

dichlorodiphenylsilane

→

(3-bromophenyl)(dibenzo[b,d]thiophen-4-yl)diphenylsilane

Выход 31.0%

Растворители

ether

ether

Условия реакции

Обработка

1. 1
   ДругоеThe resultant reaction solution
2. 2
   Другоеprepared
3. 3
   workup.ADDITIONabove was introduced dropwise
4. 4
   ДругоеIt was quenched with water
5. 5
   Экстракцияextracted with ether
6. 6
   Сушкаdried over Na2SO4
7. 7
   ДругоеUpon evaporation of the solvent
8. 8
   Другоеthe residue was purified by column chromatography on silica gel with hexane/DCM (9/1

Методика

In another flask was prepared a solution of m-bromophenyl lithium by addition of n-butyllithium solution in hexane (2.5 M, 9.48 mL, 23.70 mmol) into a solution of 1,3-dibromobenzene (2.56 mL, 21.20 mmol) in ether (70 mL) at −78° C. followed by stirring at this temperature for 3.5 h. This m-bromophenyl lithium solution was added dropwise into a solution of dichlorodiphenylsilane (4.88 mL, 23.70 mmol) in ether (70 mL) at −78° C. The resultant reaction solution was stirred at this temperature for 2 h before the dibenzo[b,d]thiophen-4-yl lithium solution prepared above was introduced dropwise. The resultant solution was allowed to slowly warm to room temperature overnight. It was quenched with water, extracted with ether and dried over Na2SO4. Upon evaporation of the solvent, the residue was purified by column chromatography on silica gel with hexane/DCM (9/1, v/v) as eluent to yield (3-bromophenyl)(dibenzo[b,d]thiophen-4-yl)diphenylsilane as a white powder (3.84 g, 31%).

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