Development of a Terpene Feedstock-Based Oxidative Synthetic Approach to the Illicium Sesquiterpenes

Author(s)

Hung, Kevin ^[1] ; Condakes, Matthew L. ^[1] ; Novaes, Luiz F. T. ^[1] ; Harwood, Stephen J. ^[1] ; Morikawa, Takahiro ^[1] ; Yang, Zhi ^[1] ; Maimone, Thomas J. ^[1]

Affiliation

^[1] Univ Calif Berkeley, Dept Chem, 826 Latimer Hall, Berkeley, CA 94720 - USA

• Document type: Journal article
• Source: Journal of the American Chemical Society; v. 141, n. 7, p. 3083-3099, FEB 20 2019.
• Web of Science Citations: 21

Abstract

The Illicium sesquiterpenes are a family of natural products containing over 100 highly oxidized and structurally complex members, many of which display interesting biological activities. This comprehensive account chronicles the evolution of a semisynthetic strategy toward these molecules from (+)-cedrol, seeking to emulate key aspects of their containing over 100 highly oxidized and structurally complex members, presumed biosynthesis. An initial route generated lower oxidation state analogs but failed in delivering a crucial hydroxy group in the final step. Insight gathered during these studies, however, ultimately led to a synthesis of the pseudoanisatinoids along with the allo-cedrane natural product 11-O-debenzoyltashironin. A second-generation strategy was then developed to access the more highly oxidized majucinoid compounds including jiadifenolide and majucin itself. Overall, one dozen natural products can be accessed from an abundant and inexpensive terpene feedstock. A multitude of general observations regarding site-selective C(sp(3))-H bond functionalization reactions in complex polycyclic architectures are reported. (AU)

• FAPESP's process: 17/18029-6 - Synthesis of Complex Antibiotics Inspired by Natural Products
• Grantee: Luiz Fernando Toneto Novaes
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate