Water → 1-Bromo-3-(trimethylsilyl)benzene

To a solution of 10 g (42.39 mmol) of 1,3-dibromobenzene in 80 mL of anhydrous Et2O, cooled to −78° C. and maintained under a nitrogen atmosphere, are added dropwise with stirring, over 30 minutes, 26.49 mL (42.39 mmol) of a solution of BuLi (1.5M/hexane). After stirring for a further 30 minutes at −78° C., 5.96 mL (46.63 mmol) of TMSCl are added dropwise to the reaction mixture. Stirring is maintained at this temperature for 90 minutes and the reaction mixture is then hydrolysed by adding 15 mL of water. The product is extracted with ethyl acetate (3×50 mL). The combined organic phases are washed with saturated aqueous NaCl solution (2×25 mL), dried over Na2SO4, filtered and evaporated under reduced pressure. The crude reaction product is purified by chromatography on a column of silica gel, eluting with heptane, to give 9.3 g of the expected 1-bromo-3-trimethylsilylbenzene, in the form of a colourless oil.

1. temperaturemaintained under a nitrogen atmosphere
2. additionare added dropwise
3. stirringAfter stirring for a further 30 minutes at −78° C.
4. stirringStirring
5. temperatureis maintained at this temperature for 90 minutes
6. extractionThe product is extracted with ethyl acetate (3×50 mL)
7. washThe combined organic phases are washed with saturated aqueous NaCl solution (2×25 mL)
8. dry with materialdried over Na2SO4
9. filtrationfiltered
10. customevaporated under reduced pressure
11. customThe crude reaction product
12. customis purified by chromatography on a column of silica gel
13. washeluting with heptane

ORD record

ord-96e5dce28f7d4d6cb1d9841a0110be5b

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08354425B2