Synthesis 2021; 53(20): 3673-3682
DOI: 10.1055/a-1529-7678
short review

Five-Membered Hetarene N-Oxides: Recent Advances in Synthesis and Reactivity

a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, 119991 Moscow, Russian Federation
b   National Research University Higher School of Economics, Myasnitskaya str. 20, 101000 Moscow, Russian Federation
,
Fedor E. Teslenko
a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, 119991 Moscow, Russian Federation
› Author Affiliations
This research was supported by the Ministry of Science and Higher Education of the Russian Federation (agreement with the N.D. Zelinsky Institute of Organic Chemistry, RAS no. 075-15-2020-803).


Abstract

Five-membered heterocyclic N-oxides attract special attention due to their significant potential applications in medicinal chemistry and advanced materials science. In this regard, novel methods for their synthesis and functionalization are in constant demand. In this short review, recent state-of-the-art achievements in the chemistry of isoxazoline N-oxides, 1,2,3-triazole 1-oxides and 1,2,5-oxadiazole 2-oxides are summarized. The main routes involving transition-metal-catalyzed and metal-free functionalization protocols along with mechanistic considerations are outlined. The transformations of these hetarene N-oxide rings as precursors to other nitrogen heterocyclic systems are also presented.

1 Introduction

2 Isoxazoline N-Oxides

3 1,2,3-Triazole 1-Oxides

4 1,2,5-Oxadiazole 2-Oxides

5 Conclusion



Publication History

Received: 08 May 2021

Accepted after revision: 16 June 2021

Accepted Manuscript online:
16 June 2021

Article published online:
05 August 2021

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