Phenyltellurium tribromide

Methoxycyclohexyl)phenyltellurium dibromide (typical procedure) To a solution of phenyltellurium tribromide (from diphenyl ditelluride (1.02 g, 2.5 mmol) and Br2 (1.20 g, 7.5 mmol) in MeOH (5 mL) is added cyclohexene (0.49 g, 6.0 mmol) and the mixture is heated under reflux for 1 h. By cooling the yellow solution at room temperature, the dibromide precipitates (1.45 g (61%) m.p. 169-171°C). 

Allylic and vinylic ethers via methoxytelluration of olefins (general procedure To a solution of phenyltellurium tribromide (2.22 g, 5 mmol), prepared from diphenyl ditelluride and bromine in methanol (5 mL), is added the olefin (10 mmol) and the mixture refluxed for 1 h. On cooling, the ()3-methoxy)alkyl or cycloalkylphenyltellurium dibromide precipitates and is separated by filtration. 

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