Total Synthesis of rac‐Sesquiterpenoid AE 1

Abstract
rac‐Sesquiterpenoid AE 1 (rac‐1) can be obtained in an 11‐step sequence starting from 5‐methylresorcinol (2). The key compound 9 is synthesized by the use of a diastereoselective dienone cyclization with the allylic silane 8. Subsequent transformation of 9 leads to rac‐1.