Total Syntheses of Norrisolide‐Type <i>Spongian</i> Diterpenes Cheloviolene C, Seconorrisolide B, and Seconorrisolide C
Tianjiao Qiao, Yicheng Wang, Sujuan Zheng, Huiying Kang, Guangxin Liang
Abstract
The first total syntheses of three unusual norrisolide-type rearranged spongian diterpenes, cheloviolene C, seconorrisolide B, and seconorrisolide C, have been accomplished via a common intermediate through late-stage ring-scissoring. The synthesis features a Wolff ring contraction for the synthesis of the trans-hydrindane system, and a crucial retro Diels-Alder reaction/intramolecular ene cyclization for the rapid stereoselective construction of the furo[2,3-b]furan system, which is commonly seen in rearranged spongian diterpenes.
Topics & Concepts
FuranTotal synthesisIntramolecular forceStereochemistryChemistryRing (chemistry)StereoselectivityDiterpeneOrganic chemistryCatalysisMarine Sponges and Natural ProductsTraditional and Medicinal Uses of AnnonaceaeSynthetic Organic Chemistry Methods