Reinvestigation of highly diastereoselective pentacyclic spirolactone formation by direct anodic oxidation of 2,4-dimethylphenol.

[摘要]：elucidated which strongly supports the postulated mechanism for the stereoselective formation of this spirolactone moiety. Addnl., the authors report an ameliorated protocol for the rearrangement to the spirolactone system.

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