Synthesis 2021; 53(01): 65-78
DOI: 10.1055/s-0040-1707385
short review

Synthetic Approaches to Non-Tropane, Bridged, Azapolycyclic Ring Systems Containing Seven-Membered Carbocycles

Authors


We thank the donors of the American Chemical Society Petroleum Research Fund (Grant No. 59202-UNI1) for financial support of our research program.


Graphical Abstract

Preview

Dedicated in memory of Prof. Gilbert Stork

Abstract

This Short Review highlights various synthetic approaches to bridged azabicyclic ring systems containing seven-membered carbocyclic rings. Such ring systems are common to a number of biologically active natural products. The seven-membered ring in such systems is generally formed in one of four ways: 1) cyclization of an acyclic precursor; 2) ring expansion or rearrangement of a different ring size; 3) cycloaddition; and 4) use of a synthetic building block with the seven-membered ring already present. Representative examples of each approach from both total synthesis and methodological studies are discussed, with an emphasis on work published

in the last twenty years.

1 Introduction

2 Cyclization Reactions

3 Ring Expansions and Rearrangements

4 Cycloadditions

5 Strategies Involving Seven-Membered Ring Building Blocks

6 Conclusion



Publication History

Received: 01 July 2020

Accepted after revision: 14 August 2020

Article published online:
11 September 2020

© 2020. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany