Sulfuric Acid → tert-Butyl 3-bromopropionate

Temperature

-20 °C

7 ml of sulfuric acid were added to a solution of 100 g of 3-bromopropionic acid in 200 ml of diethyl ether, and the reaction mixture was cooled to -20° C. Then 123 ml of liquified isobutene were added. The reaction mixture was stirred at room temperature in a pressure vessel for several hours. Subsequently, for working up, the reaction mixture was poured into dilute ice-cold aqueous sodium hydroxide solution. The ether phase was separated and the aqueous phase was extracted once more with ether. The combined organic phases were washed with aqueous sodium chloride solution, dried over sodium sulfate and evaporated under reduced pressure. The resulting crude product was distilled under reduced pressure. 100 g of tert-butyl 3-bromopropionate were obtained, boiling point (20)=75° to 77° C.

1. additionthe reaction mixture was poured into dilute ice-cold aqueous sodium hydroxide solution
2. customThe ether phase was separated
3. extractionthe aqueous phase was extracted once more with ether
4. washThe combined organic phases were washed with aqueous sodium chloride solution
5. dry with materialdried over sodium sulfate
6. customevaporated under reduced pressure
7. distillationThe resulting crude product was distilled under reduced pressure

ORD record

ord-7a266936291e42aab7490c84620f1266

Source dataset

uspto-grants-1997_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05677297