A simultaneous creation of the C4 and C5 quaternary carbon centers by an acetal [1,2] Wittig rearrangement of O-glycoside 1 derived from L-arabino-γ-lactone is the key feature in the construction of the 2,8-dioxabicyclo[3.2.1]octane core structure of zaragozic acid A (2).
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Tomooka et al. (2000) studied this question.
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