摘要:
AbstractFirst total synthesis of (±)‐13‐hydroxyneocembrene (1), starting from 6‐methyl‐5‐hepten‐2‐one (6) and geraniol (7), is described. The key steps are (i) the addition of sulfur‐stabilized carbanion 12 to aldehyde 9, (ii) the synthesis of 18 by using phase‐transfer catalyzed coupling reaction, and (iii) low‐valent titanium‐induced intramolecular coupling of oxo aldehyde 3 to afford the target molecule after the final deprotection.