Asymmetric Syntheses of (−)‐Pentazocine and (−)‐Eptazocine through an Aza‐Prins Cyclization

Two down more to go: The asymmetric syntheses of (−)-pentazocine and (−)-eptazocine are presented. The highlights of the syntheses are the construction of the core skeleton through an aza-Prins cyclization and intramolecular Friedel–Crafts reaction. 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.