sodium dithionite in tetrahydrofuran; water 0.5 h;

<b>Multi-step reaction with 2 steps<br /> </b>1: sodium metaperiodate / tetrahydrofuran; H₂O / 3 h / Ambient temperature<br />2: 1) aq. KOH, sodium dithionite, 2) 1 N NaOH, air / 1) MeOH, THF, room temperature, 12 h<br /> <br /> &nbsp;