Efficient Entry to the Hasubanan Alkaloids: First Enantioselective Total Syntheses of (−)‐Hasubanonine, (−)‐Runanine, (−)‐Delavayine, and (+)‐Periglaucine B

Maximized divergence: The hasubanan alkaloids given in the scheme have been synthesized in eight or nine steps from the aryl azide 1. The utility of 5-trimethylsilylcyclopentadiene as an easily removed, stabilizing stereocontrol element has been demonstrated.