Highly Regio‐ and Stereoselective Dirhodium Vinylcarbene Induced Nitrone Cycloaddition with Subsequent Cascade Carbenoid Aromatic Cycloaddition/NO Cleavage and Rearrangement

An abnormal cascade process provides a selective method for the preparation of tricyclic heterocycles. The cascade involves a metal carbene induced regioselective [3+2] cycloaddition, a Buchner reaction, and a [1,7]-oxygen migration, which occurs with NO cleavage (see scheme). The products are formed with remarkable specificity. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.