Zhixiong Zeng, Yifan Zhao and Yandong Zhang
Chem. Commun., 2019,55, 4250-4253
DOI:
10.1039/C9CC00933G,
Communication
Concise, divergent total syntheses of five bioactive illudalane sesquiterpenes have been achieved. Our synthesis features an intermolecular [2+2+2] cycloaddition, and a lactone-directed aromatic C–H oxygenation to generate a temporary phenolic hydroxyl group which enables regioselective methylation. Furthermore, the absolute configuration of radulactone was assigned by chemical synthesis.