摘要：

Catalysis of metal carbene transformations with selected dirhodium(II) catalysts is a useful technology for constructing complex polycycles via intramolecular cyclopropanation, C-H insertion, and ylide derived reactions of diazoacetates and diazoacetoacetates. In this thesis, novel methodologies based upon intramolecular C-H insertion and the oxonium ylides rearrangements are investigated, and a new understanding of oxonium ylide formation and rearrangements is presented.

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