反应详情

The crude vinyl triflate thus obtained (about a 4:1 mixture of vinyl triflate and prasterone acetate) is taken up with tetrahydrofuran (3.7 L). Diethyl(3-pyridyl)borane (90 g), bis(triphenylphosphine)palladium II chloride (3.8 g) and a 2M sodium carbonate aqueous solution (1 L) are loaded under inert gas environment. The resulting mixture is refluxed for about 1 h, then cooled to room temperature, and ethyl acetate (2.5 L) and water (2.5 L) are added. The aqueous phase is back-extracted with ethyl acetate (1.4 L), the combined organic phases are treated with decolourising carbon (about 100 g), and then concentrated under vacuum to obtain crude abiraterone acetate as an oil (320 g; purity about 87%; assay 51%).

1. temperatureThe resulting mixture is refluxed for about 1 h
2. extractionThe aqueous phase is back-extracted with ethyl acetate (1.4 L)
3. additionthe combined organic phases are treated with decolourising carbon (about 100 g)
4. concentrationconcentrated under vacuum