Abstract
We report oxygenated cage compounds by acetalization and ring-closing metathesis (RCM) as key steps. We used ketalization and transannular cyclization to design octacyclic triooxygenated cage compounds. In previous studies, oxepane systems have been prepared using a three-step process via Grignard addition and RCM. The present strategy described here delivers the cage bisoxepane system in two steps via ketalization process. The bisoxepane and other derivatives are confirmed by single-crystal XRD studies.
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