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: In this paper, a copper Schiff base complex with allyl functionality was prepared and reacted with amino-functionalized halloysite to furnish a polymeric moiety with multi-copper Schiff base complexes on the outer surface, which was then characterized by EDS, FTIR, TGA, ICP, TEM, XRD, VSM and elemental mapping analysis.
6 citations
TL;DR: After deprotonation, xanthene reacts with equimolar amounts of the lacylaziridines 2a,b to yield the compounds 5a, b and 6a which carry one or two amidoethyl groups at position 9 as mentioned in this paper.
Abstract: Nach Deprotonierung wird Xanthen mit aquimolaren Mengen der N-Acylaziridine 2a,b ein- und zweimal in 9-Stellung zu den Verbindungen 5a,b und 6a,b amidoethyliert. Durch analoge Umsetzung mit 1-Ethoxycarbonylaziridin (2c) unter nachfolgender Erwarmung wird das Spiro[xanthen-9,3′-pyrrolidon] 8 erhalten.
Reactions with Aziridines, XVIII:2) Amidoethylation of Xanthene with N-Acylaziridines
After deprotonation, xanthene reacts with equimolar amounts of the l-acylaziridines 2a,b to yield the compounds 5a,b and 6a,b which carry one or two amidoethyl groups at position 9. The spiro[xanthene-9,3′-pyrrolidone] 8 is obtained analogously by reaction with 1-ethoxycarbonyl aziridine (2c) and subsequent heating.
6 citations
6 citations
TL;DR: In this paper, the synthesis of biphenyl-3,3′,4,4′-tetracarboxylic dianhydride and benzophenone with different substituted phenols via Friedel-Crafts acylation reaction in the presence of dilute sulfuric acid was investigated.
Abstract: This work investigated the synthesis of biphenyl-3,3′,4,4′-tetracarboxylic dianhydride and benzophenone-3,3′,4,4′-tetracarboxylic dianhydride derivatives (3a–e and 6a–e) with different substituted phenols via Friedel-Crafts acylation reaction in the presence of dilute sulfuric acid. Dianhydride derivatives with 3-N,N′-dimethylamino phenol (3d and 6d) and resorcinol (3e and 6e) have been found to be highly fluorescent. The structures of all newly synthesized compounds were confirmed by the chromatographic, spectral and elemental data. Electrochemical study was done to determine to band gap energy, LUMO and HOMO levels energy. Band gap and LUMO energy levels were found to be lowest in xanthene derivatives substituted with 3-N,N′-dimethylamino group having value 2.24 and 4.85 eV respectively.
6 citations
TL;DR: In this article, the synthesis of substituted benzaldehydes of vanillin series with dimedone in methanol solution in the presence of catalytic quantities of triethylamine afforded 2,2′-arylmethylenebis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones.
Abstract: Condensation of substituted benzaldehydes of vanillin series with dimedone in methanol solution in the presence of catalytic quantities of triethylamine afforded 2,2′-arylmethylenebis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-ones. By catalytic cyclization of the latter in boiling benzene in the presence of sulfo cation exchanger FIBAN K-1 as catalyst 3,3,6,6-trimethyl-9-aryl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-diones were synthesized.
6 citations