Total Syntheses of (+)‐Sarcophytin, (+)‐Chatancin, (−)‐3‐Oxochatancin, and (−)‐Pavidolide B: A Divergent Approach. (12th March 2019)

• Record Type: Journal Article
• Authors: He, Chuan; Xuan, Jun; Rao, Peirong; Xie, Pei‐Pei; Hong, Xin; Lin, Xufeng; Ding, Hanfeng
• Is Part Of: Angewandte Chemie. Volume 131:Number 15(2019)
• Page Start: 5154
• Page End: 5158
• Publication Date: 2019-03-12
• Subjects: Naturstoffe -- Strukturaufklärung -- Terpenoide -- Totalsynthese -- Umlagerungen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201900782
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A concise and divergent approach for the total syntheses of four cembrane diterpenoids, namely (+)‐sarcophytin, (+)‐chatancin, (−)‐3‐oxochatancin, and (−)‐pavidolide B, has been developed, and it also led to the structural revision of (−)‐isosarcophytin. The key steps of the strategy feature a double Mukaiyama Michael addition/elimination, a Helquist annulation, two substrate‐controlled facial‐selective hydrations, and a pinacol rearrangement. The described syntheses not only achieved these natural products in an efficient manner, but also provided insight into the biosynthetic relationship between the two different skeletons.