Reacción #516527

Ecuación de reacción

sodium bicarbonate

8-bromooctanoic acid

tert-butyl 2,2,2-trichloroacetoimidate

→

tert-butyl 8-bromooctanoate

Rendimiento 38.0%

Disolventes

hexane

dichloromethane

hexane

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe resulting precipitate was separated by filtration
2. 2
   Otrothe solvent was evaporated under reduced pressure
3. 3
   OtroThe resulting residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=5/1)

Procedimiento

A 5.00 g (22.4 mmol) portion of 8-bromooctanoic acid was dissolved in a mixed solvent of 2 ml dichloromethane and 10 ml hexane, and the solution was mixed with 8.00 ml (44.8 mmol) of tert-butyl 2,2,2-trichloroacetoimidate and 0.45 ml (3.66 mmol) of boron trifluoride-ether complex and stirred at room temperature for 1 hour. The reaction solution was mixed with 10 ml of hexane and 0.031 g (3.66 mmol) of sodium bicarbonate, the resulting precipitate was separated by filtration, and then the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=5/1) to obtain 2.34 g (yield, 38%) of tert-butyl 8-bromooctanoate.

Fuente