Eco-friendly synthesis of chromeno[4,3-b]chromenes with a new photosensitized WO₃/ZnO@NH₂-EY nanocatalyst.

ABSTRACT: A new heterogeneous photoredox nanocatalyst WO₃/ZnO@NH₂-EY (EY: eosin Y) was fabricated and characterized employing some instrumental techniques such as XRD, FT-IR, ICP, TGA, and SEM. The photocatalytic efficiency of the prepared material was investigated in the preparation of various chromeno[4,3-b]chromenes via a simple and practical method. The chromene derivatives were prepared through the condensation of aromatic aldehydes, dimedone, and coumarin under an open-air atmosphere in the presence of a green LED under solventless conditions. The significant advantages of this new method include low reaction time, easy work-up, cost-effective, wide substrate scope, excellent yield, and complete atom economy of the final products. Moreover, the prepared phot

SUBMITTER: Jalili Z 

PROVIDER: S-EPMC9033197 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature