Bromine → Butyl 3-bromo-2-oxobutanoate
Reaction equation
[O:1]=[C:2]([CH2:10][CH3:11])[C:3]([O:5][CH2:6][CH2:7][CH2:8][CH3:9])=[O:4].[Br:12]Br>ClCCl>[Br:12][CH:10]([CH3:11])[C:2](=[O:1])[C:3]([O:5][CH2:6][CH2:7][CH2:8][CH3:9])=[O:4]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A solution of butyl 2-oxobutanoate (described in Patent; IMPERIAL CHEMICAL INDUSTRIES PLC; Publ.: EP 375457 B1 (1994/03/16), Appl.: EP 1989-313521 (1989/12/22), 14g, 88.6 mmol) in dichloromethane (100 mL) was cooled to 0° C., and bromine (4 mL, 80 mmol) was added over 15 minutes. Following stirring at room temperature for 30 minutes, the reaction solution was washed with aqueous sodium bicarbonate solution, washed with brine, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure to obtain 21.8 g of the title compound as a colorless liquid (100%).