Bromine → 3-Bromo-2,6-diethyl-benzaldehyde

Temperature

40 °C

To a solution of 8.01 g (60 mmol) aluminum trichloride in 10 ml dichloromethane were added at ambient temperature drop-wise 5.52 g (34 mmol) 2,6-diethyl-benzaldehyde (Example 1 c)); exothermic reaction. To the resulting dark red solution was added slowly drop-wise a solution of 5.5 g (34 mmol) bromine in 7 ml dichloromethane; strong exothermic reaction. Then the mixture was heated to 40° C. for 3 hours. The reaction mixture was cooled to ambient temperature and poured onto ice. The organic phase was separated and the aqueous solution extracted with dichloromethane, the combined extracts washed with 2N HCl solution, saturated sodium bicarbonate solution and brine, dried over MgSO4, filtered and evaporated: 7.0 g 3-bromo-2,6-diethyl-benzaldehyde of 90% purity (HPLC) that did not require further purification.

1. customexothermic reaction
2. customstrong exothermic reaction
3. temperatureThe reaction mixture was cooled to ambient temperature
4. additionpoured onto ice
5. customThe organic phase was separated
6. extractionthe aqueous solution extracted with dichloromethane
7. washthe combined extracts washed with 2N HCl solution, saturated sodium bicarbonate solution and brine
8. dry with materialdried over MgSO4
9. filtrationfiltered
10. customevaporated
11. custompurification

ORD record

ord-50f79f7183b447bd98d6dc2a147c6760

Source dataset

uspto-grants-2011_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07875645B2