EverythingAl2O3: First of all, it does not matter, you cannot do the MPV reduction on an allyl iodide, it produces an ether, as I said already.
However, even if that were not a problem, you have the additional issue of stability of the alcohol: beta-hydroxyaldehydes tend to eliminate, while
geminal diols undergo pinacol rearrangement instead of elimination when treated with acid.
Instead, consider substituting prenol with hydriodic acid to prenyl iodide, and Riley oxidation with SeO2
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