Abstract 8‐Oxabicyclo[5.1.0]octa‐2,4‐diene (1) is obtained from cycloheptatriene with commercial 40% peracetic acid. Upon catalytic and LiAlH4 reduction the allylic CO‐bond in 1 is cleaved. Acid catalised hydrolysis leads to a mixture of all six possible isomeric cycloheptadienediols. With BF3 in the absence of water isomerization to 3,5‐cycloptadienone is observed.
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Schiess et al. (1974) studied this question.
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