After adding 2,2,6,6-tetramethylpiperidine 1-oxyl free radical (31 mg, 0.20 mmol) to a solution of 2-[1-[2-(tert-butyldiphenylsiloxy)ethyl]cyclohexyl]ethanol (810 mg, 1.97 mmol) and iodobenzene diacetate (700 mg, 2.17 mmol) in methylene chloride (10 mL), the mixture was stirred at room temperature for 4 hours. The reaction mixture was washed with saturated aqueous sodium hydrogencarbonate and saturated brine in that order and dried (anhydrous sodium sulfate), and then the solvent was distilled off under reduced pressure to obtain the title compound as a brown oil (1.29 g). This was used without purification for the following step.
