Issue 23, 2023

Construction of a 2,2′-biazulene framework via Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans

Abstract

Dibenzofurans featuring a 2,2′-biazulene framework were prepared in good yields by Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans in 100% H3PO4. NMR, UV-Vis, and fluorescence spectroscopies were used to investigate the structural and optical properties of the products prepared. Remarkably, the annulated products exhibited fluorescence, with the longest wavelength of azulene derivatives reported to date, which extended into the near-infrared region under acidic conditions.

Graphical abstract: Construction of a 2,2′-biazulene framework via Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans

Supplementary files

Article information

Article type
Communication
Submitted
27 Jan 2023
Accepted
23 Feb 2023
First published
23 Feb 2023

Chem. Commun., 2023,59, 3447-3450

Construction of a 2,2′-biazulene framework via Brønsted acid-promoted annulation of 2,3-di(1-azulenyl)benzofurans

T. Shoji, N. Sakata, Y. Ariga, A. Yamazaki, R. Katoh, T. Okujima, R. Sekiguchi and S. Ito, Chem. Commun., 2023, 59, 3447 DOI: 10.1039/D3CC00373F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements