The 1,3-transposition of a hydroxy group on an allyl moiety using a metal oxo catalyst is an important transformation in organic synthesis. The isomerization of allyl alcohols can be catalyzed at high temperatures (ca. 130–200°C) by complexes such as VO(OR) 3 or WO(OR) 4 , or at room temperature by VO(acac) 2 or MoO 2 (acac) 2 when activated by Me 3 SiOOSiMe 3 or MoO 2 X 2 (X=Cl, O t Bu). 1., 2. and 3. Recently, we have reported rhenium(VII) catalysts that are very active at ...