Total Synthesis and Absolute Configuration of (−)-Gummiferol

Stereoselective synthesis of two possible diastereomers of (−)-gummiferol was accomplished by the stepwise epoxidation and Cadiot–Chodkiewicz reaction as the key transformations. Detailed comparison of their 1H and 13C NMR data and specific rotation with those of the natural product led to the absolute structural elucidation of (−)-gummiferol.