sodium periodate; bromine; sodium hydrogencarbonate 1.) water, room temp., 2.) water, room temp.; Yield given. Multistep reaction;

Multi-step reaction with 2 steps 1: 24 percent / NaOH, sodium metaperiodate / H2O / 20 - 30 °C2: 41 percent / methanol / 1 h / 0 °C