In the zone: Pd‐catalyzedoxidativecross‐coupling of N‐tosylhydrazones with allylic alcohols leads to CC bond formation. A palladium–carbene migratory insertion is proposed to play the key role in this transformation. The reaction proceeds with readily available starting materials to afford substituted alkenes in a highly stereoselective manner (see scheme).
Gold(I)-Catalyzed Enantioselective Annulations between Allenes and Alkene-Tethered Oxime Ethers: A Straight Entry to Highly Substituted Piperidines and <i>aza</i>-Bridged Medium-Sized Carbocycles
作者:David C. Marcote、Iván Varela、Jaime Fernández-Casado、José L. Mascareñas、Fernando López
DOI:10.1021/jacs.8b10388
日期:2018.12.5
present in a wide range of bioactive natural products and are therefore considered as highly valuable, privileged synthetic targets. In this manuscript, we describe a gold-catalyzed annulation strategy that allows a straightforward assembly of piperidines and piperidine-containing aza-bridged productsfrom readily available alkene-tethered oximeethers (or esters) and N-allenamides. Importantly, we