1: p-TsOH / tetrahydrofuran; H2O / 0.08 h / Heating 2: 1-Methylcyclohex-1-ene, NaClO2, H2NSO3H / CH2Cl2; H2O / 1) 0 deg C, 15 min, 2) to 25 deg C, 30 min View Scheme

1: p-TsOH / tetrahydrofuran; H2O / 0.08 h / Heating 2: 1-Methylcyclohex-1-ene, NaClO2, H2NSO3H / CH2Cl2; H2O / 1) 0 deg C, 15 min, 2) to 25 deg C, 30 min 3: 72 percent / Ph3P, diethyl azodicarboxylate / toluene View Scheme