CC BY 4.0 · Synthesis 2019; 51(21): 3915-3946
DOI: 10.1055/s-0037-1611897
review
Copyright with the author

Recent Advances Towards Syntheses of Diterpenoid Alkaloids

,
,
,
Madeline Olsen
,
Mark Lautens
Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada   Email: mark.lautens@utoronto.ca
› Author Affiliations
We thank the University of Toronto, and the Natural Sciences and Engineering Research Council (NSERC), and the Audrey and Ragnar Olsen Fellowship for financial support. Christian Dank was supported by an Erwin Schroedinger postdoctoral fellowship awarded by the Austrian Science Fund (FWF) J 4348-N28.
Further Information

Publication History

Received: 20 June 2019

Accepted: 28 June 2019

Publication Date:
05 August 2019 (online)


Dedicated to the 50th anniversary of SYNTHESIS

Abstract

The diterpenoid alkaloids serve as a rich source of synthetic targets for organic chemists, due to the intriguing structure of the overlapping ring systems, along with biological activities commonly associated with compounds of this group. Fifteen total syntheses and numerous synthetic studies towards construction of ring fragments have been reported since 2010. This review article gives a brief overview of diterpenoid alkaloids and summarizes the recent synthetic efforts.

1 Introduction

1.1 Structural Classification and Biosynthetic Origin

1.2 Structure Elucidation of the Aconitum Alkaloids

2 Total Syntheses

2.1 C18-Diterpenoid Alkaloids

2.2 C19-Diterpenoid Alkaloids

2.3 C20-Diterpenoid Alkaloids

3 Strategies To Synthesize Ring Systems

3.1 Radical-Based Cyclizations

3.2 Ruthenium-Mediated Enyne Cycloisomerization

3.3 Reductive Coupling

3.4 Diels–Alder Reactions

3.5 Oxidative Dearomatization/Diels–Alder Sequence

3.6 Transannular Aziridation

3.7 Intramolecular [5+2] Cycloaddition

3.8 Miscellaneous

4 Conclusion