Topic
Xanthene
About: Xanthene is a research topic. Over the lifetime, 2132 publications have been published within this topic receiving 34803 citations. The topic is also known as: Xanthene & dibenzo[a,e]pyran.
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TL;DR: A green, competent one-pot synthesis of 14-aryl 14 H -dibenzo [a, j ] xanthene and its bio-computational studies are reported as discussed by the authors.
11 citations
TL;DR: Starting from 2-hydroxy-1,4-naphthoquinone (lawsone), eight new 6H-dibenzo[b,h]xanthene derivatives selectively under solvent-free conditions are synthesized.
Abstract: Starting from 2-hydroxy-1,4-naphthoquinone (lawsone), we synthesized eight new 6H-dibenzo[b,h]xanthene derivatives selectively under solvent-free conditions. Spectroscopic investigations confirmed that only the isomer 6H-dibenzo[b,h]xanthene was obtained in all eight cases. Computational studies provide a rationalization for the selective appearance of these isomers having as an intermediate an addition product.
11 citations
TL;DR: This study describes the synthesis of a class of anion-binding catalysts based on a xanthene scaffold that was examined in the cyclization of 3- and 2-substituted furans onto N-acyliminium ions.
11 citations
TL;DR: In this article, the authors described an efficient and novel method using Fe-X as a new and reusable catalyst for the synthesis of 1,8-dioxooctahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthene derivatives from one-pot three-component condensation of aromatic aldehyde and dimedone or β-naphthol under solvent free conditions.
Abstract: A new modified zeolite containing Fe nanoparticles loaded in zeolite X (Fe-X) has been synthesized and characterized by FT-IR, XRD, EDX and SEM techniques and its catalytic activity has been investigated in the synthesis of two series of xanthene derivatives. We have described an efficient and novel method using Fe-X as a new and reusable catalyst for the synthesis of 1,8-dioxooctahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes derivatives from one-pot three-component condensation of aromatic aldehyde and dimedone or β-naphthol under solvent-free conditions. The significant advantages of the present method are high yields of products, short reaction time, easy separation of the catalyst from the reaction mixture, easy product isolation, solvent-free condition and reusability of the catalyst.
A new modified zeolite containing Fe nanoparticles loaded in zeolite X has been synthesized, characterized and applied in the synthesis of two series of xanthene derivatives.
11 citations
TL;DR: The 9,10-dimethylacridium cation with 4-nitroso-N,N-dialkylanilines gives highly bathochromic azacyanines in good yields as discussed by the authors.
11 citations