反应详情

4′-Chloro-3-methylbiphen-4-ylboronic acid (6.0 g, 0.024 mol) is added in one portion to a mixture of lead tetraacetate (13.0 g, 0.029 mol) and mercuric acetate (0.38 g, 5 mol %) in chloroform (50 ml) under an atmosphere of nitrogen. The reaction mixture is stirred at ambient temperature until dissolution is complete, and then heated at 40° C. for 4 hrs. The reaction mixture is cooled to ambient temperature, filtered through a plug of diatomaceous earth and the filtrate is concentrated under reduced pressure to give an orange colored solid. Trituration with hexane (50 ml) to afford a yellow solid which was dried under high vacuum. This solid is then dissolved in chloroform (100 ml), anhydrous potassium carbonate (42.5 g, 0.3 mol) is added and the suspension is stirred rapidly for 10 minutes. The mixture is filtered through a plug of diatomaceous earth, and the filtrate is concentrated under reduced pressure to give 4′-chloro-3-methylbiphen-4-yllead triacetate (7.8 g) as a cream colored solid.

1. temperatureheated at 40° C. for 4 hrs
2. temperatureThe reaction mixture is cooled to ambient temperature
3. filtrationfiltered through a plug of diatomaceous earth
4. concentrationthe filtrate is concentrated under reduced pressure
5. customto give an orange colored solid
6. customwas dried under high vacuum
7. dissolutionThis solid is then dissolved in chloroform (100 ml)
8. stirringthe suspension is stirred rapidly for 10 minutes
9. filtrationThe mixture is filtered through a plug of diatomaceous earth
10. concentrationthe filtrate is concentrated under reduced pressure