Synthesis and Characterization of Novel Cyclopenta[c]pyrans Functionalized with Phenothiazine or Terpyridine Units

Abstract

This work reports the synthesis and structural characterization of novel derivatives incorporating the cyclopenta[c]pyran core and either a phenothiazine or a 2,2′:6′,2″-terpyridine unit. The coupling between the cyclopenta[c]pyran moiety and the heterocyclic unit was achieved through a Suzuki–Miyaura cross-coupling reaction. The compounds were analyzed by NMR, UV–vis, and fluorescence spectroscopy, while the molecular structure of the phenylcyclopenta[c]pyranyl-biphenylterpyridine derivative was confirmed by single-crystal X-ray diffraction.

Keywords

Cyclopenta[c]pyrans - Terpyridines - Phenothiazines - UV–vis - Fluorescence - Molecular structures

Publication History

Received: 29 September 2025

Accepted after revision: 01 December 2025

Accepted Manuscript online:
02 December 2025

Article published online:
22 December 2025

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