Issue 4, 2025

[3 + 2] cycloaddition between cyclic diaryl λ3-bromanes and nitrones towards the formation of dihydrobenzisoxazoles and an evaluation of regioisomeric bioactivity

Abstract

Here, an example of an efficient construction of important dihydrobenzisoxazole cores from cycloaddition reactions between cyclic diaryl λ3-bromanes as the aryne precursors and nitrones is reported. Many dihydrobenzisoxazole-containing compounds were synthesized under transition-metal-free conditions, and this approach was found to feature a broad substrate scope, good functional group compatibility and reasonable regioselectivities. Preliminary bioactivity evaluations demonstrated that multiple examples of these dihydrobenzisoxazoles showed potential activities against porcine reproductive and respiratory syndrome virus (PRRSV).

Graphical abstract: [3 + 2] cycloaddition between cyclic diaryl λ3-bromanes and nitrones towards the formation of dihydrobenzisoxazoles and an evaluation of regioisomeric bioactivity

Supplementary files

Article information

Article type
Research Article
Submitted
08 Nov 2024
Accepted
07 Dec 2024
First published
10 Dec 2024

Org. Chem. Front., 2025,12, 1212-1216

[3 + 2] cycloaddition between cyclic diaryl λ3-bromanes and nitrones towards the formation of dihydrobenzisoxazoles and an evaluation of regioisomeric bioactivity

J. Fan, M. Wang, J. Zhou, T. Gan, W. Zhang, L. Wei and B. Li, Org. Chem. Front., 2025, 12, 1212 DOI: 10.1039/D4QO02102A

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