Potassium Carbonate → [Diacetyloxy-(5-bromo-2-chlorophenyl)plumbyl] acetate
Reaktionsgleichung
[C:1]([O-:4])(=[O:3])[CH3:2].[C:5]([O-:8])(=[O:7])[CH3:6].[C:9]([O-:12])(=[O:11])[CH3:10].C([O-])(=O)C.[Pb+4:17].[Br:18][C:19]1[CH:20]=[CH:21][C:22]([Cl:28])=[C:23](B(O)O)[CH:24]=1.C(=O)([O-])[O-].[K+].[K+]>>[C:1]([O-:4])(=[O:3])[CH3:2].[C:5]([O-:8])(=[O:7])[CH3:6].[C:9]([O-:12])(=[O:11])[CH3:10].[Br:18][C:19]1[CH:20]=[CH:21][C:22]([Cl:28])=[C:23]([Pb+3:17])[CH:24]=1Komponenten
4
Reaktionsbedingungen
- Temperatur
- 40 °C
Versuchsvorschrift
To a mixture of lead tetraacetate (26.83 g, 61 mmol) and mercuric diacetate (0.77 g, 2.4 mmol), thoroughly flushed with nitrogen, is added anhydrous chloroform (50 ml) and the reaction mixture is stirred and heated to 40° C. 5-Bromo-2-chlorophenylboronic acid (11.39 g, 48 mmol) is added in one portion, and the reaction mixture is stirred at 40° C. for 4 hours. After cooling to room temperature potassium carbonate (3.34 g) is added, the mixture stirred vigorously for 5 minutes and then filtered. The filtrate is concentrated in vacuo to give 5-bromo-2-chlorophenyllead triacetate (25.33 g), used without further purification in the next step.