1: 95 percent / 6-(methylsulfinyl)hexanoylmethyl-polystyrene; oxalyl chloride; Et3N / CH2Cl2 / -50 - 20 °C 2: 96 percent / triphenylphosphine-polystyrene / CH2Cl2 / 4 h / 20 °C 3: 91 percent / 1,4-cyclohexadiene / Pd/C / ethanol / 2.5 h / 20 °C View Scheme