Results 131 to 140 of about 1,749 (157)
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Journal of Heterocyclic Chemistry, 1987
AbstractThe reaction of 1‐naphthol or phenol derivatives with oxalic and sulfuric acids yielded novel spirolactones. Eight examples (2a‐h) were synthesized by this reaction. The structures of the spirolactones were established from spectral evidence and the X‐ray diffraction studies. Some of the spirolactones form the solvates with the aromatic solvent
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AbstractThe reaction of 1‐naphthol or phenol derivatives with oxalic and sulfuric acids yielded novel spirolactones. Eight examples (2a‐h) were synthesized by this reaction. The structures of the spirolactones were established from spectral evidence and the X‐ray diffraction studies. Some of the spirolactones form the solvates with the aromatic solvent
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Xanthene-Modified and Hangman Iron Corroles
Inorganic Chemistry, 2011Iron corroles modified with a xanthene scaffold are delivered from easily available starting materials in abbreviated reaction times. These new iron corroles have been spectroscopically examined with particular emphasis on defining the oxidation state of the metal center.
Matthias, Schwalbe +4 more
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Gastric antisecretory 9H-xanthen-9-amines
Journal of Medicinal Chemistry, 1983A series of 9H-xanthen-9-amines possessing a wide variety of nitrogen substituents at C-9 was prepared for evaluation of gastric antisecretory activity. These substituents included the acetamidine, imidate, pyrimidine, thiazoline, quinuclidine, 2-hydrazinopyridine, aminopiperidine, aminoalkylimidazole, and aminoalkylpyridine moieties.
P E, Bender +13 more
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Published as part of Abad-Luna, Carmelo & Albaladejo-García, Aquilino, 2025, Macrolepidópteros de las comarcas de Cartagena y del Mar Menor (Murcia, SE España) (Insecta: Lepidoptera), pp.
Abad-Luna, Carmelo +1 more
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Abad-Luna, Carmelo +1 more
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ChemInform, 1987
Abstract1‐Naphthol (I) or the substituted phenols (IV) react with oxalic acid in the presence of sulfuric acid to give the spiro‐γ‐lactones (III) or (V) which form solvate complexes with aromatic solvent molecules such as toluene, xylene, or nitrobenzene.
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Abstract1‐Naphthol (I) or the substituted phenols (IV) react with oxalic acid in the presence of sulfuric acid to give the spiro‐γ‐lactones (III) or (V) which form solvate complexes with aromatic solvent molecules such as toluene, xylene, or nitrobenzene.
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Ultrasound contrast using halogenated xanthenes
The Journal of the Acoustical Society of America, 2006New contrast agents for ultrasound imaging and methods for use of such agents for imaging of human or animal tissue are described, wherein a primary active component of such medicaments is a halogenated xanthene or halogenated xanthene derivative. Preferably, the halogenated xanthene is Rose Bengal or a functional derivative of Rose Bengal.
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Über partiell hydrierte Xanthene und eine neue Xanthen‐Synthese. I
Berichte der deutschen chemischen Gesellschaft, 1914W. Borsche, A. Geyer
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