Octalones dissolving metals

Stable conformation of an excited enone which has a substantially pyramidalized P-carbon. For example, addition of allene to octalone (19) produces (20) which results from addition of allene oiqmsite the angular substituent (equation 30). Similar results are obtained in the dissolving metal reductions of... 

Dissolving metal reduction of a,/J-unsaturated ketones which are part of an octalone system places the //-hydrogen atom in an axial position (see Section D.2.3.2.). 

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