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Synthesis of an unexplored cardo-typed optical material showing a high refractive index of 1.83 is described. The hepta-cycle precursor wherein dibenzo[g,p]chrysene and cyclopentanone are fused undertook double arylation to form a quaternary carbon. The resulting cardo scaffold was ranked with the primal cardo-monomer bis-phenol fluorene in chemical properties, which clarified the efficacy of dibenzo[g,p]chrysene.

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  This is the peer reviewed version of the following article: T. Yura, R. Noda, I. Okada, Z. Guo, T. Nakanishi, Y. Yamaoka, T. Iwasawa, Eur. J. Org. Chem. 2025, 28, e202401409, which has been published in final form at https://doi.org/10.1002/ejoc.202401409. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Keyword: Cardo structure, Dibenzo[g,p]chrysene, Refractive index, Bisphenol fluorene, Polycycles

Date published: 2025-03-17

Publisher: Wiley

Journal:

• European Journal of Organic Chemistry (ISSN: 1434193X) vol. 28 issue. 11

Funding:

• JSPS 22K05086
• NIMS NIMS Joint Research Hub Program

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5391

First published URL: https://doi.org/10.1002/ejoc.202401409

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Updated at: 2025-03-31 17:00:22 +0900

Published on MDR: 2026-01-22 08:20:36 +0900