反应详情

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a suspension of 1,3-dibromobenzene (2.45 g, 10.07 mmol) in THF (25.0 mL) was treated at −78° C. with n-BuLi (4.0 mL of a 2.5M solution in hexane, 10.00 mmol). The reaction mixture was stirred for 30 min before N,N-dimethylacetaminde (1.50 mL, 16.13 mmol) was added and the solution was then allowed to warm to rt over 1 h. Sat. aq. NH4Cl was then added and the aq. layer was extracted with Et2O (3×50 mL) and the combined org. extracts were dried over Na2SO4, filtered, and the solvents were removed under reduced pressure. Purification of the residue by FC (20:1 hept-EA) gave the title compound as a white solid: TLC:rf (10:1 hept-EA)=0.28. LC-MS-conditions 02: tR=0.95 min.

1. additionwas added
2. extractionthe aq. layer was extracted with Et2O (3×50 mL)
3. dry with materialextracts were dried over Na2SO4
4. filtrationfiltered
5. customthe solvents were removed under reduced pressure
6. customPurification of the residue by FC (20:1 hept-EA)