Abstract
Nicholas reactions on 2,7-dioxygenated naphthalenes give C-1monosubstitution and C-1/C-8 disubstitution in most -cases.From γ-carbonyl cation monocondensation product 3B or alkyne-unsubstituted dicondensationproduct 4A, cyclohepta[ DE]naphthalenes bearing no substituents, GEM-dimethyl substituents, and a ketonefunction, and the rearranged abietane framework of microstegiolmay be prepared.
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