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The reaction of Hagemann’s ester andan electrophile can occur theoretically at C-1, C-3, C-5, andC-2’ positions (Fig. 1). As an example, however, it has beengenerally accepted that the site preference for alkylation wasC-3, the resulting C-3-alkyl derivatives often being accom-panied by small amounts of the C-1-alkyl products.

Base-Mediated Aerobic Oxidation of Hagemann's Ester: Competitive Hydroxylation at C-1 and C-3 Positions