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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Patent•
25 Sep 2002TL;DR: In this article, the use of isocyanates with aminophenol compounds as intermediates for the production of urethane-substituted xanthene colorants, particularly triphenylmethane derivatives such as rhodamines, is described.
Abstract: Novel addition products of isocyanates with oxyalkylene-substituted aminophenol compounds as intermediates for the production of urethane-substituted xanthene colorants, particularly triphenylmethane derivatives such as rhodamines, are provided. The xanthene colorants exhibit improved wax and/or oil solubility and high purity. The urethane-substituted xanthene colorant features very good wax and/or oil solubility, and is believed to be relatively nontoxic. A method for producing this novel colorant is also provided.
4 citations
Book•
01 Jan 1985
4 citations
Patent•
03 Feb 2005
TL;DR: In this paper, a diagnostic agent for positron emission tomography (PET) and methods for use of such agents for imaging of human or animal tissue are described, wherein the primary active component of such agent is a radiolabeled halogenated xanthene or halogenation of xanthenes derivative.
Abstract: New diagnostic agents for positron emission tomography (PET) and methods for use of such agents for imaging of human or animal tissue are described, wherein a primary active component of such agents is a radiolabeled halogenated xanthene or halogenated xanthene derivative. Preferably, the radiolabeled halogenated xanthene is radiolabeled Rose Bengal or a functional derivative of Rose Bengal.
4 citations
TL;DR: A series of 14-alkyl and aryl-14H-dibenzo xanthenes have been synthesized with high yields through a one-pot condensation of β-naphthol with alkyl or aryL aldehydes in the presence of BSA or o-TSA in a solvent-free medium.
Abstract: A series of 14-alkyl and aryl-14H-dibenzo[a.j]xanthenes have been synthesized with high yields through a one-pot condensation of β-naphthol with alkyl or aryl aldehydes in the presence of BSA or o-TSA in a solvent-free medium.
4 citations
TL;DR: The Reaction of Resorcinol with Methane Halides under Alkaline Conditions as mentioned in this paper, in the presence of methane halides under alkaline conditions, is shown to react with the red anion of 3-hydroxy 4-[2,4-dihydroxy-benzylidene]-cyclohexadien-(2,5)-one(1) II or 2,2′,2″,4,4′,4″-pentahydroxyfuchson V. The structure of the anions II and V has been
Abstract: In alkalischer Losung reagiert Resorcin mit Chloroform bzw. Tetrachlorkohlenstoff zum roten Anion des 3-Hydroxy-4-[2,4-dihydroxy-benzyliden]-cyclohexadien-(2,5)-ons(1) II bzw. des 2,2′,2″,4′,4″-Pentahydroxy-fuchsons V. Die Struktur der Farbprodukte wird gesichert durch Uberfuhren in Xanthenderivate bekannter Struktur.
The Reaction of Resorcinol with Methane Halides under Alkaline Conditions
Resorcinol reacts with methane halides under alkaline conditions to the red anion of 3-Hydroxy 4-[2,4-dihydroxy-benzylidene]-cyclohexadien-(2,5)-one(1) II or 2,2′,2″,4′,4″-pentahydroxy-fuchson V. The structure of the anions II and V has been proved by conversion into well known xanthene derivatives.
4 citations