sodium chlorite; trans cyclohexenyl ester; aminosulfonic acid in dichloromethane; water 1) 0 deg C, 15 min, 2) to 25 deg C, 30 min; Yield given;

1: 1-Methylcyclohex-1-ene, NaClO2, H2NSO3H / CH2Cl2; H2O / 1) 0 deg C, 15 min, 2) to 25 deg C, 30 min 2: 72 percent / Ph3P, diethyl azodicarboxylate / toluene View Scheme