Synthesis 2019; 51(10): 2039-2057
DOI: 10.1055/s-0037-1611576
review
© Georg Thieme Verlag Stuttgart · New York

Contemporary Synthetic Strategies towards Secosteroids, abeo-Steroids, and Related Triterpenes

Florian Noack
,
Robert C. Heinze
,
Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany   Email: philipp.heretsch@fu-berlin.de
› Author Affiliations
Funding by Deutsche Forschungsgemeinschaft (DFG) is gratefully acknowledged (grants HE 7133/5-1 and HE 7133/7-1).
Further Information

Publication History

Received: 12 February 2019

Accepted after revision: 01 March 2019

Publication Date:
16 April 2019 (online)


Abstract

Steroids have long been sought after as synthetic targets. Their rearranged counterparts, though, have only recently received more attention, when isolation and biological testing programs revealed several molecular entities that were both structurally intriguing as well as biologically relevant. This review will highlight contemporary synthetic approaches towards the growing class of seco- and abeo-steroids and some related triterpenoid natural products.

1 Introduction

2 Cyclocitrinol

2.1 Li’s Synthesis of Cyclocitrinol

2.2 Gui’s Synthesis of Cyclocitrinol

3 Strophasterol

3.1 Heretsch’s Synthesis of Strophasterol A

3.2 Kuwahara’s Synthesis of Strophasterols A and B

4 Pleurocin A/Matsutakone and Pleurocin B

4.1 Heretsch’s Synthesis of Pleurocin A/Matsutakone and Pleurocin B

5 Aplysiasecosterol A

5.1 Li’s Synthesis of Aplysiasecosterol A

6 Glaucogenins C and D

6.1 Tian’s Syntheses of 5,6-Dihydro-glaucogenin C and Glaucogenin D

7 Physalin B

7.1 Sodeoka’s Synthesis of the DFGH Ring System of Physalin B

8 Limonin

8.1 Hirama’s Synthesis of (±)-Limonin

9 Schiglautone A

9.1 Ding’s Synthesis of (±)-atrop-Schiglautone A

10 Conclusion